{"id":183,"date":"2023-11-23T12:33:02","date_gmt":"2023-11-23T12:33:02","guid":{"rendered":"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//www.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//groundwater/groundwater/wp-json/wp/v2/pages/183//data/groundwater/wp-json/wp/v2/pages/183//groundwater-levels/groundwater/wp-json/wp/v2/pages/183//therfield-rectory/groundwater/wp-json/wp/v2/pages/183//"},"modified":"2025-12-17T13:53:41","modified_gmt":"2025-12-17T13:53:41","slug":"therfield-rectory","status":"publish","type":"page","link":"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//www.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//groundwater/groundwater/wp-json/wp/v2/pages/183//data/groundwater/wp-json/wp/v2/pages/183//groundwater-levels/groundwater/wp-json/wp/v2/pages/183//therfield-rectory/groundwater/wp-json/wp/v2/pages/183//","title":{"rendered":"Therfield Rectory"},"content":{"rendered":"/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<section class=/groundwater/wp-json/wp/v2/pages/183/"hero-section hero-section-with-social/groundwater/wp-json/wp/v2/pages/183/">/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<div class=/groundwater/wp-json/wp/v2/pages/183/"hero-info-wrap/groundwater/wp-json/wp/v2/pages/183/">/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<div class=/groundwater/wp-json/wp/v2/pages/183/"container/groundwater/wp-json/wp/v2/pages/183/">/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<div class=/groundwater/wp-json/wp/v2/pages/183/"row/groundwater/wp-json/wp/v2/pages/183/">/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<div class=/groundwater/wp-json/wp/v2/pages/183/"col-12/groundwater/wp-json/wp/v2/pages/183/">/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<div class=/groundwater/wp-json/wp/v2/pages/183/"hero-info/groundwater/wp-json/wp/v2/pages/183/">/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<h1>Therfield Rectory</groundwater/wp-json/wp/v2/pages/183//h1>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t</groundwater/wp-json/wp/v2/pages/183//div>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t</groundwater/wp-json/wp/v2/pages/183//div>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t</groundwater/wp-json/wp/v2/pages/183//div>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t</groundwater/wp-json/wp/v2/pages/183//div>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t</groundwater/wp-json/wp/v2/pages/183//div>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<div class=/groundwater/wp-json/wp/v2/pages/183/"social-wrap social-wrap-inline-them/groundwater/wp-json/wp/v2/pages/183/">/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<div class=/groundwater/wp-json/wp/v2/pages/183/"sea-background-f/groundwater/wp-json/wp/v2/pages/183/">/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<span>Share this article</groundwater/wp-json/wp/v2/pages/183//span><a target=/groundwater/wp-json/wp/v2/pages/183/"_blank/groundwater/wp-json/wp/v2/pages/183/"  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class=/groundwater/wp-json/wp/v2/pages/183/"hidden/groundwater/wp-json/wp/v2/pages/183/">Twitter</groundwater/wp-json/wp/v2/pages/183//span></groundwater/wp-json/wp/v2/pages/183//span></groundwater/wp-json/wp/v2/pages/183//a><a   onclick=/groundwater/wp-json/wp/v2/pages/183/"javascript:void( (function() {var e=document.createElement('script' );e.setAttribute('type','text/groundwater/wp-json/wp/v2/pages/183//javascript' );e.setAttribute('charset','UTF-8' );e.setAttribute('src','/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//assets.pinterest.com/groundwater/wp-json/wp/v2/pages/183//js/groundwater/wp-json/wp/v2/pages/183//pinmarklet.js?r='+Math.random()*99999999);document.body.appendChild(e)})());/groundwater/wp-json/wp/v2/pages/183/"  href=/groundwater/wp-json/wp/v2/pages/183/"javascript:void(0);/groundwater/wp-json/wp/v2/pages/183/"><span class=/groundwater/wp-json/wp/v2/pages/183/"icon-pinterest/groundwater/wp-json/wp/v2/pages/183/"><span class=/groundwater/wp-json/wp/v2/pages/183/"hidden/groundwater/wp-json/wp/v2/pages/183/">Pinterest</groundwater/wp-json/wp/v2/pages/183//span></groundwater/wp-json/wp/v2/pages/183//span></groundwater/wp-json/wp/v2/pages/183//a><a target=/groundwater/wp-json/wp/v2/pages/183/"_blank/groundwater/wp-json/wp/v2/pages/183/"  href=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//wa.me?text=https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//www.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//groundwater/groundwater/wp-json/wp/v2/pages/183//data/groundwater/wp-json/wp/v2/pages/183//groundwater-levels/groundwater/wp-json/wp/v2/pages/183//therfield-rectory/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183/"><span class=/groundwater/wp-json/wp/v2/pages/183/"icon-whatsapp/groundwater/wp-json/wp/v2/pages/183/"><span class=/groundwater/wp-json/wp/v2/pages/183/"hidden/groundwater/wp-json/wp/v2/pages/183/">WhatsApp</groundwater/wp-json/wp/v2/pages/183//span></groundwater/wp-json/wp/v2/pages/183//span></groundwater/wp-json/wp/v2/pages/183//a><a   href=/groundwater/wp-json/wp/v2/pages/183/"mailto:?subject=Therfield%20Rectory&#038;body=%20(https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//www.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//groundwater/groundwater/wp-json/wp/v2/pages/183//data/groundwater/wp-json/wp/v2/pages/183//groundwater-levels/groundwater/wp-json/wp/v2/pages/183//therfield-rectory/groundwater/wp-json/wp/v2/pages/183//)/groundwater/wp-json/wp/v2/pages/183/"><span class=/groundwater/wp-json/wp/v2/pages/183/"icon-mail/groundwater/wp-json/wp/v2/pages/183/"><span class=/groundwater/wp-json/wp/v2/pages/183/"hidden/groundwater/wp-json/wp/v2/pages/183/">Email</groundwater/wp-json/wp/v2/pages/183//span></groundwater/wp-json/wp/v2/pages/183//span></groundwater/wp-json/wp/v2/pages/183//a><a href=/groundwater/wp-json/wp/v2/pages/183/"#/groundwater/wp-json/wp/v2/pages/183/" data-copy=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//www.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//groundwater/groundwater/wp-json/wp/v2/pages/183//data/groundwater/wp-json/wp/v2/pages/183//groundwater-levels/groundwater/wp-json/wp/v2/pages/183//therfield-rectory/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183/" class=/groundwater/wp-json/wp/v2/pages/183/"copy-url-on-click/groundwater/wp-json/wp/v2/pages/183/"><span class=/groundwater/wp-json/wp/v2/pages/183/"icon-link/groundwater/wp-json/wp/v2/pages/183/"><span class=/groundwater/wp-json/wp/v2/pages/183/"hidden/groundwater/wp-json/wp/v2/pages/183/">Copy Link</groundwater/wp-json/wp/v2/pages/183//span></groundwater/wp-json/wp/v2/pages/183//span></groundwater/wp-json/wp/v2/pages/183//a></groundwater/wp-json/wp/v2/pages/183//div></groundwater/wp-json/wp/v2/pages/183//div>/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t</groundwater/wp-json/wp/v2/pages/183//section>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<section class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-bgs-blocks-content-container content-section/groundwater/wp-json/wp/v2/pages/183/"><div class=/groundwater/wp-json/wp/v2/pages/183/"container/groundwater/wp-json/wp/v2/pages/183/"><div class=/groundwater/wp-json/wp/v2/pages/183/"row/groundwater/wp-json/wp/v2/pages/183/"><div class=/groundwater/wp-json/wp/v2/pages/183/"col-12/groundwater/wp-json/wp/v2/pages/183/">/groundwater/wp-json/wp/v2/pages/183/n<p class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-paragraph/groundwater/wp-json/wp/v2/pages/183/">Water levels have been recorded in the <a href=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//webapps.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//lexicon/groundwater/wp-json/wp/v2/pages/183//lexicon.cfm?pub=CK/groundwater/wp-json/wp/v2/pages/183/">Chalk Group</groundwater/wp-json/wp/v2/pages/183//a> at Therfield Rectory in Hertfordshire, south-east England, since 1883. It is one of the few sites with continuous monitoring prior to 1900.</groundwater/wp-json/wp/v2/pages/183//p>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<p class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-paragraph/groundwater/wp-json/wp/v2/pages/183/"><a href=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//www.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//about-bgs/groundwater/wp-json/wp/v2/pages/183//contact-us/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183/">BGS Enquiries</groundwater/wp-json/wp/v2/pages/183//a> can help you to access data from the National Groundwater Level Archive (NGLA) for this well.</groundwater/wp-json/wp/v2/pages/183//p>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<figure  class=/groundwater/wp-json/wp/v2/pages/183/"img-wrap/groundwater/wp-json/wp/v2/pages/183/"><img decoding=/groundwater/wp-json/wp/v2/pages/183/"async/groundwater/wp-json/wp/v2/pages/183/" src=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//www.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//groundwater/groundwater/wp-json/wp/v2/pages/183//wp-content/groundwater/wp-json/wp/v2/pages/183//uploads/groundwater/wp-json/wp/v2/pages/183//sites/groundwater/wp-json/wp/v2/pages/183//4/groundwater/wp-json/wp/v2/pages/183//2023/groundwater/wp-json/wp/v2/pages/183//12/groundwater/wp-json/wp/v2/pages/183//TherfieldRectory-RedSpot-150x150.jpg/groundwater/wp-json/wp/v2/pages/183/" class=/groundwater/wp-json/wp/v2/pages/183/"lazy-blur/groundwater/wp-json/wp/v2/pages/183/" alt=/groundwater/wp-json/wp/v2/pages/183/"Location of Therfield Rectory. BGS /groundwater/wp-json/wp/v2/pages/183/u00a9 UKRI./groundwater/wp-json/wp/v2/pages/183/" data-src=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//www.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//groundwater/groundwater/wp-json/wp/v2/pages/183//wp-content/groundwater/wp-json/wp/v2/pages/183//uploads/groundwater/wp-json/wp/v2/pages/183//sites/groundwater/wp-json/wp/v2/pages/183//4/groundwater/wp-json/wp/v2/pages/183//2023/groundwater/wp-json/wp/v2/pages/183//12/groundwater/wp-json/wp/v2/pages/183//TherfieldRectory-RedSpot.jpg/groundwater/wp-json/wp/v2/pages/183/" /groundwater/wp-json/wp/v2/pages/183//><figcaption class=/groundwater/wp-json/wp/v2/pages/183/"caption sm-line/groundwater/wp-json/wp/v2/pages/183/">/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<div class=/groundwater/wp-json/wp/v2/pages/183/"caption-icon/groundwater/wp-json/wp/v2/pages/183/">/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<img decoding=/groundwater/wp-json/wp/v2/pages/183/"async/groundwater/wp-json/wp/v2/pages/183/" src=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//www.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//groundwater/groundwater/wp-json/wp/v2/pages/183//wp-content/groundwater/wp-json/wp/v2/pages/183//themes/groundwater/wp-json/wp/v2/pages/183//bgs/groundwater/wp-json/wp/v2/pages/183//img/groundwater/wp-json/wp/v2/pages/183//info-caption.svg/groundwater/wp-json/wp/v2/pages/183/" alt=/groundwater/wp-json/wp/v2/pages/183/"Information icon/groundwater/wp-json/wp/v2/pages/183/">/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t</groundwater/wp-json/wp/v2/pages/183//div>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<div class=/groundwater/wp-json/wp/v2/pages/183/"caption-text/groundwater/wp-json/wp/v2/pages/183/"><p>Location of Therfield Rectory. BGS /groundwater/wp-json/wp/v2/pages/183/u00a9 UKRI.</groundwater/wp-json/wp/v2/pages/183//p>/groundwater/wp-json/wp/v2/pages/183/n</groundwater/wp-json/wp/v2/pages/183//div>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t</groundwater/wp-json/wp/v2/pages/183//figcaption></groundwater/wp-json/wp/v2/pages/183//figure>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<h2 class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-heading/groundwater/wp-json/wp/v2/pages/183/">Hydrograph</groundwater/wp-json/wp/v2/pages/183//h2>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<figure class=/groundwater/wp-json/wp/v2/pages/183/"img-central/groundwater/wp-json/wp/v2/pages/183/">/groundwater/wp-json/wp/v2/pages/183/n  <img decoding=/groundwater/wp-json/wp/v2/pages/183/"async/groundwater/wp-json/wp/v2/pages/183/" src=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//resources.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//groundwater/groundwater/wp-json/wp/v2/pages/183//hydrographs/groundwater/wp-json/wp/v2/pages/183//bgsfigs/groundwater/wp-json/wp/v2/pages/183//THERFIELD RECTORY-allyears.webp/groundwater/wp-json/wp/v2/pages/183/" loading=/groundwater/wp-json/wp/v2/pages/183/"lazy/groundwater/wp-json/wp/v2/pages/183/" class=/groundwater/wp-json/wp/v2/pages/183/"img-fluid/groundwater/wp-json/wp/v2/pages/183/" alt=/groundwater/wp-json/wp/v2/pages/183/"/groundwater/wp-json/wp/v2/pages/183/"> /groundwater/wp-json/wp/v2/pages/183/n<figcaption>/groundwater/wp-json/wp/v2/pages/183/n        Groundwater level timeseries over the full observational record for Therfield Rectory. National Groundwater Level Archive, /groundwater/wp-json/wp/v2/pages/183/u00a9 UKRI /groundwater/wp-json/wp/v2/pages/183/u2013 BGS/groundwater/wp-json/wp/v2/pages/183/n    </groundwater/wp-json/wp/v2/pages/183//figcaption>/groundwater/wp-json/wp/v2/pages/183/n</groundwater/wp-json/wp/v2/pages/183//figure>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<figure class=/groundwater/wp-json/wp/v2/pages/183/"img-central/groundwater/wp-json/wp/v2/pages/183/">/groundwater/wp-json/wp/v2/pages/183/n  <img decoding=/groundwater/wp-json/wp/v2/pages/183/"async/groundwater/wp-json/wp/v2/pages/183/" src=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//resources.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//groundwater/groundwater/wp-json/wp/v2/pages/183//hydrographs/groundwater/wp-json/wp/v2/pages/183//bgsfigs/groundwater/wp-json/wp/v2/pages/183//THERFIELD RECTORY-recentyears.webp/groundwater/wp-json/wp/v2/pages/183/" loading=/groundwater/wp-json/wp/v2/pages/183/"lazy/groundwater/wp-json/wp/v2/pages/183/" class=/groundwater/wp-json/wp/v2/pages/183/"img-fluid/groundwater/wp-json/wp/v2/pages/183/" alt=/groundwater/wp-json/wp/v2/pages/183/"/groundwater/wp-json/wp/v2/pages/183/"> /groundwater/wp-json/wp/v2/pages/183/n<figcaption>/groundwater/wp-json/wp/v2/pages/183/n        Groundwater level timeseries for the last 5 years of available data for  Therfield Rectory. National Groundwater Level Archive, /groundwater/wp-json/wp/v2/pages/183/u00a9 UKRI /groundwater/wp-json/wp/v2/pages/183/u2013 BGS/groundwater/wp-json/wp/v2/pages/183/n    </groundwater/wp-json/wp/v2/pages/183//figcaption>/groundwater/wp-json/wp/v2/pages/183/n</groundwater/wp-json/wp/v2/pages/183//figure>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<h2 class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-heading/groundwater/wp-json/wp/v2/pages/183/">Information about the well</groundwater/wp-json/wp/v2/pages/183//h2>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<h3 class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-heading/groundwater/wp-json/wp/v2/pages/183/">Hydrogeological setting</groundwater/wp-json/wp/v2/pages/183//h3>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<div id=/groundwater/wp-json/wp/v2/pages/183/"wysiwyg-4838-block_ab5129ff82d8223e895e452a5a760be2/groundwater/wp-json/wp/v2/pages/183/" class=/groundwater/wp-json/wp/v2/pages/183/"  /groundwater/wp-json/wp/v2/pages/183/" >/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<div class=/groundwater/wp-json/wp/v2/pages/183/"col-12 responsive-table/groundwater/wp-json/wp/v2/pages/183/"><table>/groundwater/wp-json/wp/v2/pages/183/n<tbody>/groundwater/wp-json/wp/v2/pages/183/n<tr>/groundwater/wp-json/wp/v2/pages/183/n<th style=/groundwater/wp-json/wp/v2/pages/183/"width: 110%;height: 23px;background-color: #002e40/groundwater/wp-json/wp/v2/pages/183/" colspan=/groundwater/wp-json/wp/v2/pages/183/"2/groundwater/wp-json/wp/v2/pages/183/"><span style=/groundwater/wp-json/wp/v2/pages/183/"color: #ffffff/groundwater/wp-json/wp/v2/pages/183/">Therfield Rectory</groundwater/wp-json/wp/v2/pages/183//span></groundwater/wp-json/wp/v2/pages/183//th>/groundwater/wp-json/wp/v2/pages/183/n</groundwater/wp-json/wp/v2/pages/183//tr>/groundwater/wp-json/wp/v2/pages/183/n<tr>/groundwater/wp-json/wp/v2/pages/183/n<td><strong>Wellmaster ID</groundwater/wp-json/wp/v2/pages/183//strong></groundwater/wp-json/wp/v2/pages/183//td>/groundwater/wp-json/wp/v2/pages/183/n<td>TL33/groundwater/wp-json/wp/v2/pages/183//4</groundwater/wp-json/wp/v2/pages/183//td>/groundwater/wp-json/wp/v2/pages/183/n</groundwater/wp-json/wp/v2/pages/183//tr>/groundwater/wp-json/wp/v2/pages/183/n<tr>/groundwater/wp-json/wp/v2/pages/183/n<td><strong>NGR</groundwater/wp-json/wp/v2/pages/183//strong></groundwater/wp-json/wp/v2/pages/183//td>/groundwater/wp-json/wp/v2/pages/183/n<td>5335 2369</groundwater/wp-json/wp/v2/pages/183//td>/groundwater/wp-json/wp/v2/pages/183/n</groundwater/wp-json/wp/v2/pages/183//tr>/groundwater/wp-json/wp/v2/pages/183/n<tr>/groundwater/wp-json/wp/v2/pages/183/n<td><strong>Datum</groundwater/wp-json/wp/v2/pages/183//strong></groundwater/wp-json/wp/v2/pages/183//td>/groundwater/wp-json/wp/v2/pages/183/n<td>154.81 /groundwater/wp-json/wp/v2/pages/183/u00a0m AOD</groundwater/wp-json/wp/v2/pages/183//td>/groundwater/wp-json/wp/v2/pages/183/n</groundwater/wp-json/wp/v2/pages/183//tr>/groundwater/wp-json/wp/v2/pages/183/n<tr>/groundwater/wp-json/wp/v2/pages/183/n<th style=/groundwater/wp-json/wp/v2/pages/183/"width: 110%;height: 23px;background-color: #002e40/groundwater/wp-json/wp/v2/pages/183/" colspan=/groundwater/wp-json/wp/v2/pages/183/"2/groundwater/wp-json/wp/v2/pages/183/"><span style=/groundwater/wp-json/wp/v2/pages/183/"color: #ffffff/groundwater/wp-json/wp/v2/pages/183/">Monitoring details</groundwater/wp-json/wp/v2/pages/183//span></groundwater/wp-json/wp/v2/pages/183//th>/groundwater/wp-json/wp/v2/pages/183/n</groundwater/wp-json/wp/v2/pages/183//tr>/groundwater/wp-json/wp/v2/pages/183/n<tr>/groundwater/wp-json/wp/v2/pages/183/n<td><strong>Type</groundwater/wp-json/wp/v2/pages/183//strong></groundwater/wp-json/wp/v2/pages/183//td>/groundwater/wp-json/wp/v2/pages/183/n<td>Groundwater level</groundwater/wp-json/wp/v2/pages/183//td>/groundwater/wp-json/wp/v2/pages/183/n</groundwater/wp-json/wp/v2/pages/183//tr>/groundwater/wp-json/wp/v2/pages/183/n<tr>/groundwater/wp-json/wp/v2/pages/183/n<td><strong>Aquifer</groundwater/wp-json/wp/v2/pages/183//strong></groundwater/wp-json/wp/v2/pages/183//td>/groundwater/wp-json/wp/v2/pages/183/n<td>Chalk</groundwater/wp-json/wp/v2/pages/183//td>/groundwater/wp-json/wp/v2/pages/183/n</groundwater/wp-json/wp/v2/pages/183//tr>/groundwater/wp-json/wp/v2/pages/183/n<tr>/groundwater/wp-json/wp/v2/pages/183/n<td><strong>Confinement</groundwater/wp-json/wp/v2/pages/183//strong></groundwater/wp-json/wp/v2/pages/183//td>/groundwater/wp-json/wp/v2/pages/183/n<td>Confined</groundwater/wp-json/wp/v2/pages/183//td>/groundwater/wp-json/wp/v2/pages/183/n</groundwater/wp-json/wp/v2/pages/183//tr>/groundwater/wp-json/wp/v2/pages/183/n<tr>/groundwater/wp-json/wp/v2/pages/183/n<td><strong>Depth</groundwater/wp-json/wp/v2/pages/183//strong></groundwater/wp-json/wp/v2/pages/183//td>/groundwater/wp-json/wp/v2/pages/183/n<td>83.23 m</groundwater/wp-json/wp/v2/pages/183//td>/groundwater/wp-json/wp/v2/pages/183/n</groundwater/wp-json/wp/v2/pages/183//tr>/groundwater/wp-json/wp/v2/pages/183/n<tr>/groundwater/wp-json/wp/v2/pages/183/n<th style=/groundwater/wp-json/wp/v2/pages/183/"width: 110%;height: 23px;background-color: #002e40/groundwater/wp-json/wp/v2/pages/183/" colspan=/groundwater/wp-json/wp/v2/pages/183/"2/groundwater/wp-json/wp/v2/pages/183/"><span style=/groundwater/wp-json/wp/v2/pages/183/"color: #ffffff/groundwater/wp-json/wp/v2/pages/183/">Record</groundwater/wp-json/wp/v2/pages/183//span></groundwater/wp-json/wp/v2/pages/183//th>/groundwater/wp-json/wp/v2/pages/183/n</groundwater/wp-json/wp/v2/pages/183//tr>/groundwater/wp-json/wp/v2/pages/183/n<tr>/groundwater/wp-json/wp/v2/pages/183/n<td><strong>Monitored by</groundwater/wp-json/wp/v2/pages/183//strong></groundwater/wp-json/wp/v2/pages/183//td>/groundwater/wp-json/wp/v2/pages/183/n<td>EA Thames</groundwater/wp-json/wp/v2/pages/183//td>/groundwater/wp-json/wp/v2/pages/183/n</groundwater/wp-json/wp/v2/pages/183//tr>/groundwater/wp-json/wp/v2/pages/183/n<tr>/groundwater/wp-json/wp/v2/pages/183/n<td><strong>Records commence</groundwater/wp-json/wp/v2/pages/183//strong></groundwater/wp-json/wp/v2/pages/183//td>/groundwater/wp-json/wp/v2/pages/183/n<td>1883</groundwater/wp-json/wp/v2/pages/183//td>/groundwater/wp-json/wp/v2/pages/183/n</groundwater/wp-json/wp/v2/pages/183//tr>/groundwater/wp-json/wp/v2/pages/183/n<tr>/groundwater/wp-json/wp/v2/pages/183/n<td><strong>Records end</groundwater/wp-json/wp/v2/pages/183//strong></groundwater/wp-json/wp/v2/pages/183//td>/groundwater/wp-json/wp/v2/pages/183/n<td>Active</groundwater/wp-json/wp/v2/pages/183//td>/groundwater/wp-json/wp/v2/pages/183/n</groundwater/wp-json/wp/v2/pages/183//tr>/groundwater/wp-json/wp/v2/pages/183/n</groundwater/wp-json/wp/v2/pages/183//tbody>/groundwater/wp-json/wp/v2/pages/183/n</groundwater/wp-json/wp/v2/pages/183//table></groundwater/wp-json/wp/v2/pages/183//div>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t</groundwater/wp-json/wp/v2/pages/183//div>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<p class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-paragraph/groundwater/wp-json/wp/v2/pages/183/">This well penetrated the <a href=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//webapps.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//lexicon/groundwater/wp-json/wp/v2/pages/183//lexicon.cfm?pub=LECH/groundwater/wp-json/wp/v2/pages/183/">Lewes Nodular Chalk Formation</groundwater/wp-json/wp/v2/pages/183//a> and <a href=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//webapps.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//lexicon/groundwater/wp-json/wp/v2/pages/183//lexicon.cfm?pub=SECK/groundwater/wp-json/wp/v2/pages/183/">Seaford Chalk Formation</groundwater/wp-json/wp/v2/pages/183//a> (undifferentiated). The chalk aquifer is overlain and confined by 3&nbsp;m of low-permeability <a href=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//webapps.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//lexicon/groundwater/wp-json/wp/v2/pages/183//lexicon.cfm?pub=LOFT/groundwater/wp-json/wp/v2/pages/183/">Lowestoft Formation</groundwater/wp-json/wp/v2/pages/183//a> till.</groundwater/wp-json/wp/v2/pages/183//p>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<figure  class=/groundwater/wp-json/wp/v2/pages/183/"img-wrap/groundwater/wp-json/wp/v2/pages/183/"><a href=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//www.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//groundwater/groundwater/wp-json/wp/v2/pages/183//wp-content/groundwater/wp-json/wp/v2/pages/183//uploads/groundwater/wp-json/wp/v2/pages/183//sites/groundwater/wp-json/wp/v2/pages/183//4/groundwater/wp-json/wp/v2/pages/183//2023/groundwater/wp-json/wp/v2/pages/183//12/groundwater/wp-json/wp/v2/pages/183//therfield-rectory-large-geology.webp/groundwater/wp-json/wp/v2/pages/183/" data-toggle=/groundwater/wp-json/wp/v2/pages/183/"lightbox/groundwater/wp-json/wp/v2/pages/183/" data-footer=/groundwater/wp-json/wp/v2/pages/183/"&lt;p&gt;Geological map of the area around Therfield Rectory. BGS /groundwater/wp-json/wp/v2/pages/183/u00a9 UKRI.&lt;/groundwater/wp-json/wp/v2/pages/183//p&gt;/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/" data-gallery=/groundwater/wp-json/wp/v2/pages/183/"gallery_69339/groundwater/wp-json/wp/v2/pages/183/"><img decoding=/groundwater/wp-json/wp/v2/pages/183/"async/groundwater/wp-json/wp/v2/pages/183/" src=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//www.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//groundwater/groundwater/wp-json/wp/v2/pages/183//wp-content/groundwater/wp-json/wp/v2/pages/183//uploads/groundwater/wp-json/wp/v2/pages/183//sites/groundwater/wp-json/wp/v2/pages/183//4/groundwater/wp-json/wp/v2/pages/183//2023/groundwater/wp-json/wp/v2/pages/183//12/groundwater/wp-json/wp/v2/pages/183//therfield-rectory-large-geology-150x150.webp/groundwater/wp-json/wp/v2/pages/183/" class=/groundwater/wp-json/wp/v2/pages/183/"lazy-blur/groundwater/wp-json/wp/v2/pages/183/" alt=/groundwater/wp-json/wp/v2/pages/183/"Geological map of the area around Therfield Rectory. BGS /groundwater/wp-json/wp/v2/pages/183/u00a9 UKRI./groundwater/wp-json/wp/v2/pages/183/" data-src=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//www.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//groundwater/groundwater/wp-json/wp/v2/pages/183//wp-content/groundwater/wp-json/wp/v2/pages/183//uploads/groundwater/wp-json/wp/v2/pages/183//sites/groundwater/wp-json/wp/v2/pages/183//4/groundwater/wp-json/wp/v2/pages/183//2023/groundwater/wp-json/wp/v2/pages/183//12/groundwater/wp-json/wp/v2/pages/183//therfield-rectory-large-geology-300x246.webp/groundwater/wp-json/wp/v2/pages/183/" /groundwater/wp-json/wp/v2/pages/183//></groundwater/wp-json/wp/v2/pages/183//a><figcaption class=/groundwater/wp-json/wp/v2/pages/183/"caption sm-line/groundwater/wp-json/wp/v2/pages/183/">/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<div class=/groundwater/wp-json/wp/v2/pages/183/"caption-icon/groundwater/wp-json/wp/v2/pages/183/">/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<img decoding=/groundwater/wp-json/wp/v2/pages/183/"async/groundwater/wp-json/wp/v2/pages/183/" src=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//www.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//groundwater/groundwater/wp-json/wp/v2/pages/183//wp-content/groundwater/wp-json/wp/v2/pages/183//themes/groundwater/wp-json/wp/v2/pages/183//bgs/groundwater/wp-json/wp/v2/pages/183//img/groundwater/wp-json/wp/v2/pages/183//info-caption.svg/groundwater/wp-json/wp/v2/pages/183/" alt=/groundwater/wp-json/wp/v2/pages/183/"Information icon/groundwater/wp-json/wp/v2/pages/183/">/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t</groundwater/wp-json/wp/v2/pages/183//div>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<div class=/groundwater/wp-json/wp/v2/pages/183/"caption-text/groundwater/wp-json/wp/v2/pages/183/"><p>Geological map of the area around Therfield Rectory. BGS /groundwater/wp-json/wp/v2/pages/183/u00a9 UKRI.</groundwater/wp-json/wp/v2/pages/183//p>/groundwater/wp-json/wp/v2/pages/183/n</groundwater/wp-json/wp/v2/pages/183//div>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<div class=/groundwater/wp-json/wp/v2/pages/183/"expand-box expand-box-top/groundwater/wp-json/wp/v2/pages/183/"><a href=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//www.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//groundwater/groundwater/wp-json/wp/v2/pages/183//wp-content/groundwater/wp-json/wp/v2/pages/183//uploads/groundwater/wp-json/wp/v2/pages/183//sites/groundwater/wp-json/wp/v2/pages/183//4/groundwater/wp-json/wp/v2/pages/183//2023/groundwater/wp-json/wp/v2/pages/183//12/groundwater/wp-json/wp/v2/pages/183//therfield-rectory-large-geology.webp/groundwater/wp-json/wp/v2/pages/183/" ><img decoding=/groundwater/wp-json/wp/v2/pages/183/"async/groundwater/wp-json/wp/v2/pages/183/" src=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//www.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//groundwater/groundwater/wp-json/wp/v2/pages/183//wp-content/groundwater/wp-json/wp/v2/pages/183//themes/groundwater/wp-json/wp/v2/pages/183//bgs/groundwater/wp-json/wp/v2/pages/183//img/groundwater/wp-json/wp/v2/pages/183//expand.svg/groundwater/wp-json/wp/v2/pages/183/" alt=/groundwater/wp-json/wp/v2/pages/183/"Expand icon/groundwater/wp-json/wp/v2/pages/183/"></groundwater/wp-json/wp/v2/pages/183//a></groundwater/wp-json/wp/v2/pages/183//div>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t</groundwater/wp-json/wp/v2/pages/183//figcaption></groundwater/wp-json/wp/v2/pages/183//figure>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<h3 class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-heading/groundwater/wp-json/wp/v2/pages/183/">Well or borehole construction</groundwater/wp-json/wp/v2/pages/183//h3>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<p class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-paragraph/groundwater/wp-json/wp/v2/pages/183/">The well consists of an 83.23&nbsp;m deep, 1.52&nbsp;m-diameter well, brick lined to 4.57&nbsp;m. The well was originally only 81.1&nbsp;m deep; it was deepened to 84.1&nbsp;m prior to measurements commencing in 1883. When plumbed in 1992, it was found to be only 83.2&nbsp;m deep, presumably due to silting.</groundwater/wp-json/wp/v2/pages/183//p>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<h3 class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-heading/groundwater/wp-json/wp/v2/pages/183/">Hydrograph response</groundwater/wp-json/wp/v2/pages/183//h3>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<p class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-paragraph/groundwater/wp-json/wp/v2/pages/183/">The well hydrograph has an annual sinusoidal appearance, except when it goes dry. As the average thickness of the unsaturated zone is between 75 and 80&nbsp;mbgl, there is normally a two to three month time lag between the start of winter recharge and when the water level starts rising. The time lag has been known to reach five months.</groundwater/wp-json/wp/v2/pages/183//p>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<h3 class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-heading/groundwater/wp-json/wp/v2/pages/183/">Data issues</groundwater/wp-json/wp/v2/pages/183//h3>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<p class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-paragraph/groundwater/wp-json/wp/v2/pages/183/">The method used to measure the water level in the earliest measurements was presumably a line with some kind of float on the end. These lines underwent considerable amounts of stretching and shrinking over time. Between the start of records in 1883 and August 1885, the line was found to have stretched 3.5&nbsp;m; between September 1885 and December 1895 it had stretched a further 4.0&nbsp;m. The line used between July 1903 and February 1923 stretched 6.9&nbsp;m over this period, whereas the line used from May 1921 to December 1937 shrank 2.2&nbsp;m, and a further 4.2&nbsp;m by May 1949. Measurements were corrected assuming that the stretching and shrinkage had occurred uniformly, which may not have been the case.</groundwater/wp-json/wp/v2/pages/183//p>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<p class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-paragraph/groundwater/wp-json/wp/v2/pages/183/">There are no records for the period June 1952 and June 1956 and there is a note on the file that the EA consider the levels for the period between 1914 and 1920 as very dubious.</groundwater/wp-json/wp/v2/pages/183//p>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<p class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-paragraph/groundwater/wp-json/wp/v2/pages/183/">In 1999, a dedicated observation well was constructed at Hay Farm (TL33/groundwater/wp-json/wp/v2/pages/183//67) and this has replaced Therfield Rectory as an index well.</groundwater/wp-json/wp/v2/pages/183//p>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<h3 class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-heading/groundwater/wp-json/wp/v2/pages/183/">References</groundwater/wp-json/wp/v2/pages/183//h3>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<p class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-paragraph/groundwater/wp-json/wp/v2/pages/183/">/groundwater/wp-json/wp/v2/pages/183/u00d3 Dochartaigh, B. 1999. Long groundwater records: Processing and presentation of the Therfield Rectory hydrograph. <em>British Geological Survey Technical Report</groundwater/wp-json/wp/v2/pages/183//em> WD/groundwater/wp-json/wp/v2/pages/183//99/groundwater/wp-json/wp/v2/pages/183//11. (Nottingham, UK: British Geological Survey.)</groundwater/wp-json/wp/v2/pages/183//p>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<figure  class=/groundwater/wp-json/wp/v2/pages/183/"img-wrap/groundwater/wp-json/wp/v2/pages/183/"><a href=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//www.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//groundwater/groundwater/wp-json/wp/v2/pages/183//wp-content/groundwater/wp-json/wp/v2/pages/183//uploads/groundwater/wp-json/wp/v2/pages/183//sites/groundwater/wp-json/wp/v2/pages/183//4/groundwater/wp-json/wp/v2/pages/183//2023/groundwater/wp-json/wp/v2/pages/183//12/groundwater/wp-json/wp/v2/pages/183//hillshade-map-therfield-rectory.webp/groundwater/wp-json/wp/v2/pages/183/" data-toggle=/groundwater/wp-json/wp/v2/pages/183/"lightbox/groundwater/wp-json/wp/v2/pages/183/" data-footer=/groundwater/wp-json/wp/v2/pages/183/"&lt;p&gt;Topographical map with hillshade of the area around Therfield Rectory. BGS /groundwater/wp-json/wp/v2/pages/183/u00a9 UKRI.&lt;/groundwater/wp-json/wp/v2/pages/183//p&gt;/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/" data-gallery=/groundwater/wp-json/wp/v2/pages/183/"gallery_60595/groundwater/wp-json/wp/v2/pages/183/"><img decoding=/groundwater/wp-json/wp/v2/pages/183/"async/groundwater/wp-json/wp/v2/pages/183/" src=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//www.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//groundwater/groundwater/wp-json/wp/v2/pages/183//wp-content/groundwater/wp-json/wp/v2/pages/183//uploads/groundwater/wp-json/wp/v2/pages/183//sites/groundwater/wp-json/wp/v2/pages/183//4/groundwater/wp-json/wp/v2/pages/183//2023/groundwater/wp-json/wp/v2/pages/183//12/groundwater/wp-json/wp/v2/pages/183//hillshade-map-therfield-rectory-150x150.webp/groundwater/wp-json/wp/v2/pages/183/" class=/groundwater/wp-json/wp/v2/pages/183/"lazy-blur/groundwater/wp-json/wp/v2/pages/183/" alt=/groundwater/wp-json/wp/v2/pages/183/"Topographic map with hillshade of the area around Therfield Rectory. BGS /groundwater/wp-json/wp/v2/pages/183/u00a9 UKRI./groundwater/wp-json/wp/v2/pages/183/" data-src=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//www.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//groundwater/groundwater/wp-json/wp/v2/pages/183//wp-content/groundwater/wp-json/wp/v2/pages/183//uploads/groundwater/wp-json/wp/v2/pages/183//sites/groundwater/wp-json/wp/v2/pages/183//4/groundwater/wp-json/wp/v2/pages/183//2023/groundwater/wp-json/wp/v2/pages/183//12/groundwater/wp-json/wp/v2/pages/183//hillshade-map-therfield-rectory-300x201.webp/groundwater/wp-json/wp/v2/pages/183/" /groundwater/wp-json/wp/v2/pages/183//></groundwater/wp-json/wp/v2/pages/183//a><figcaption class=/groundwater/wp-json/wp/v2/pages/183/"caption sm-line/groundwater/wp-json/wp/v2/pages/183/">/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<div class=/groundwater/wp-json/wp/v2/pages/183/"caption-icon/groundwater/wp-json/wp/v2/pages/183/">/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<img decoding=/groundwater/wp-json/wp/v2/pages/183/"async/groundwater/wp-json/wp/v2/pages/183/" src=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//www.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//groundwater/groundwater/wp-json/wp/v2/pages/183//wp-content/groundwater/wp-json/wp/v2/pages/183//themes/groundwater/wp-json/wp/v2/pages/183//bgs/groundwater/wp-json/wp/v2/pages/183//img/groundwater/wp-json/wp/v2/pages/183//info-caption.svg/groundwater/wp-json/wp/v2/pages/183/" alt=/groundwater/wp-json/wp/v2/pages/183/"Information icon/groundwater/wp-json/wp/v2/pages/183/">/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t</groundwater/wp-json/wp/v2/pages/183//div>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<div class=/groundwater/wp-json/wp/v2/pages/183/"caption-text/groundwater/wp-json/wp/v2/pages/183/"><p>Topographical map with hillshade of the area around Therfield Rectory. BGS /groundwater/wp-json/wp/v2/pages/183/u00a9 UKRI.</groundwater/wp-json/wp/v2/pages/183//p>/groundwater/wp-json/wp/v2/pages/183/n</groundwater/wp-json/wp/v2/pages/183//div>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t<div class=/groundwater/wp-json/wp/v2/pages/183/"expand-box expand-box-top/groundwater/wp-json/wp/v2/pages/183/"><a href=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//www.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//groundwater/groundwater/wp-json/wp/v2/pages/183//wp-content/groundwater/wp-json/wp/v2/pages/183//uploads/groundwater/wp-json/wp/v2/pages/183//sites/groundwater/wp-json/wp/v2/pages/183//4/groundwater/wp-json/wp/v2/pages/183//2023/groundwater/wp-json/wp/v2/pages/183//12/groundwater/wp-json/wp/v2/pages/183//hillshade-map-therfield-rectory.webp/groundwater/wp-json/wp/v2/pages/183/" ><img decoding=/groundwater/wp-json/wp/v2/pages/183/"async/groundwater/wp-json/wp/v2/pages/183/" src=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//www.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//groundwater/groundwater/wp-json/wp/v2/pages/183//wp-content/groundwater/wp-json/wp/v2/pages/183//themes/groundwater/wp-json/wp/v2/pages/183//bgs/groundwater/wp-json/wp/v2/pages/183//img/groundwater/wp-json/wp/v2/pages/183//expand.svg/groundwater/wp-json/wp/v2/pages/183/" alt=/groundwater/wp-json/wp/v2/pages/183/"Expand icon/groundwater/wp-json/wp/v2/pages/183/"></groundwater/wp-json/wp/v2/pages/183//a></groundwater/wp-json/wp/v2/pages/183//div>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t/groundwater/wp-json/wp/v2/pages/183/t</groundwater/wp-json/wp/v2/pages/183//figcaption></groundwater/wp-json/wp/v2/pages/183//figure>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<h2 class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-heading/groundwater/wp-json/wp/v2/pages/183/" id=/groundwater/wp-json/wp/v2/pages/183/"acknowledgements/groundwater/wp-json/wp/v2/pages/183/">Acknowledgements</groundwater/wp-json/wp/v2/pages/183//h2>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<p class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-paragraph/groundwater/wp-json/wp/v2/pages/183/">Groundwater level data are provided to the NGLA by the Environment Agency (EA), Natural Resources Wales &#8211; Cyfoeth Naturiol Cymru (NRW), the Scottish Environment Protection Agency (SEPA) and, for Northern Ireland, the Department for Infrastructure &#8211; Rivers and the Northern Ireland Environment Agency.</groundwater/wp-json/wp/v2/pages/183//p>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<p class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-paragraph/groundwater/wp-json/wp/v2/pages/183/">Further information about these monitoring networks can be found on these pages:</groundwater/wp-json/wp/v2/pages/183//p>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<ul class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-list/groundwater/wp-json/wp/v2/pages/183/">/groundwater/wp-json/wp/v2/pages/183/n<li><a href=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//timeseriesdoc.sepa.org.uk/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183/" target=/groundwater/wp-json/wp/v2/pages/183/"_blank/groundwater/wp-json/wp/v2/pages/183/" rel=/groundwater/wp-json/wp/v2/pages/183/"noreferrer noopener/groundwater/wp-json/wp/v2/pages/183/">Scotland</groundwater/wp-json/wp/v2/pages/183//a>&nbsp;(SEPA)</groundwater/wp-json/wp/v2/pages/183//li>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<li><a href=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//environment.data.gov.uk/groundwater/wp-json/wp/v2/pages/183//hydrology/groundwater/wp-json/wp/v2/pages/183//landing/groundwater/wp-json/wp/v2/pages/183/" target=/groundwater/wp-json/wp/v2/pages/183/"_blank/groundwater/wp-json/wp/v2/pages/183/" rel=/groundwater/wp-json/wp/v2/pages/183/"noreferrer noopener/groundwater/wp-json/wp/v2/pages/183/">England</groundwater/wp-json/wp/v2/pages/183//a>&nbsp;(Defra)&nbsp;</groundwater/wp-json/wp/v2/pages/183//li>/groundwater/wp-json/wp/v2/pages/183/n</groundwater/wp-json/wp/v2/pages/183//ul>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<h2 class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-heading/groundwater/wp-json/wp/v2/pages/183/">Contact</groundwater/wp-json/wp/v2/pages/183//h2>/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n/groundwater/wp-json/wp/v2/pages/183/n<p class=/groundwater/wp-json/wp/v2/pages/183/"wp-block-paragraph/groundwater/wp-json/wp/v2/pages/183/">Please&nbsp;<a href=/groundwater/wp-json/wp/v2/pages/183/"https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//www.bgs.ac.uk/groundwater/wp-json/wp/v2/pages/183//about-bgs/groundwater/wp-json/wp/v2/pages/183//contact-us/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183/">contact BGS Enquiries</groundwater/wp-json/wp/v2/pages/183//a>&nbsp;for further information.</groundwater/wp-json/wp/v2/pages/183//p>/groundwater/wp-json/wp/v2/pages/183/n</groundwater/wp-json/wp/v2/pages/183//div></groundwater/wp-json/wp/v2/pages/183//div></groundwater/wp-json/wp/v2/pages/183//div></groundwater/wp-json/wp/v2/pages/183//section>/groundwater/wp-json/wp/v2/pages/183/n","protected":false},"excerpt":{"rendered":"","protected":false},"author":3,"featured_media":0,"parent":30,"menu_order":22,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"1","_relevanssi_noindex_reason":"","footnotes":""},"tags":[],"class_list":["post-183","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:/groundwater/wp-json/wp/v2/pages/183///groundwater/wp-json/wp/v2/pages/183//yoast.com/groundwater/wp-json/wp/v2/pages/183//product/groundwater/wp-json/wp/v2/pages/183//yoast-seo-wordpress/groundwater/wp-json/wp/v2/pages/183// -->/groundwater/wp-json/wp/v2/pages/183/n<title>Therfield Rectory - BGS Groundwater</groundwater/wp-json/wp/v2/pages/183//title>/groundwater/wp-json/wp/v2/pages/183/n<meta name=/groundwater/wp-json/wp/v2/pages/183/"description/groundwater/wp-json/wp/v2/pages/183/" content=/groundwater/wp-json/wp/v2/pages/183/"Water levels have been recorded at Therfield Rectory in Hertfordshire since 1883, and with continuous monitoring prior to 1900./groundwater/wp-json/wp/v2/pages/183/" /groundwater/wp-json/wp/v2/pages/183//>/groundwater/wp-json/wp/v2/pages/183/n<meta name=/groundwater/wp-json/wp/v2/pages/183/"robots/groundwater/wp-json/wp/v2/pages/183/" content=/groundwater/wp-json/wp/v2/pages/183/"index, follow, 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Rectory - BGS 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