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Reference	Name	Designation date	Document URL	Documentation URL	Geometry	Point	Notes	Entry date	Start date	End date
10169	Bakers Arms	2015-09-08	Invalid URI		MULTIPOLYGON (((-0.011013 51.576434,-0.010886 51.576464,-0.011002 51.576686,-0.011029 51.576686,-0.011615 51.576556,-0.012235 51.576358,-0.012182 51.576329,-0.012321 51.576283,-0.012295 51.576273,-0.012511 51.576117,-0.012610 51.576036,-0.012703 51.575978,-0.012952 51.575878,-0.013066 51.575884,-0.013178 51.575917,-0.013275 51.575964,-0.013340 51.575976,-0.013482 51.575805,-0.013333 51.575588,-0.013335 51.575549,-0.013438 51.575439,-0.013510 51.575386,-0.013591 51.575432,-0.013728 51.575319,-0.013891 51.575204,-0.013845 51.575177,-0.013936 51.575067,-0.014174 51.574899,-0.014253 51.574944,-0.014293 51.574918,-0.015029 51.575389,-0.015967 51.575021,-0.015956 51.574998,-0.015998 51.574992,-0.015956 51.574931,-0.015959 51.574924,-0.015026 51.574155,-0.014662 51.573869,-0.013978 51.574382,-0.013692 51.574213,-0.013350 51.574438,-0.013087 51.574637,-0.012997 51.574587,-0.012824 51.574576,-0.012707 51.574653,-0.012721 51.574658,-0.012595 51.574750,-0.012312 51.574914,-0.012363 51.575122,-0.012113 51.575224,-0.012294 51.575391,-0.012096 51.575489,-0.011541 51.575792,-0.011113 51.576000,-0.011010 51.576035,-0.011079 51.576232,-0.011191 51.576273,-0.011153 51.576317,-0.011136 51.576356,-0.011099 51.576382,-0.011088 51.576372,-0.011013 51.576434)))	POINT (-0.013413 51.575206)		2025-11-11	2015-09-08

Your dataset is missing the document-url column.

The Conservation area guidance explains how to fix the issue:

A URL to the document containing the authoritative source for the area. This is usually a PDF containing the area drawn on a map.

Example: http://www.LPAwebsite.org.uk/data/conservationareas/smithroad-area.pdf