{"geometry":{"type":"MultiPolygon","coordinates":[[[[-0.081346,51.514131],[-0.081343,51.514464],[-0.081886,51.514464],[-0.081885,51.514133],[-0.081346,51.514131]]]]},"type":"Feature","properties":{"entry-date":"2026-05-12","start-date":"2022-09-28","end-date":"2027-09-27","entity":2300248,"name":"St Helen's Tower, 1 Undershaft","dataset":"certificate-of-immunity","typology":"geography","reference":"1482873","prefix":"certificate-of-immunity","organisation-entity":"16","quality":"authoritative","documentation-url":"https://historicengland.org.uk/listing/the-list/list-entry/1482873"}}