Your data has issues

There is a problem

2 entries must have dates in YYYY-MM-DD format

Reference	Name	Designation date	Document URL	Documentation URL	Geometry	Point	Notes	Entry date	Start date	End date
CA006	PUDSEY - FULNECK		https://www.leeds.gov.uk/sites/default/files/files-imported/6cd78f76a5b34e94d227cdfc7874b2f559728ec3ca4508f7dcf1a1bcae89b7e2.pdf	https://www.leeds.gov.uk/planning/conservation-protection-and-heritage/conservation-area	MULTIPOLYGON (((-1.668351 53.783478,-1.668340 53.783404,-1.667976 53.783419,-1.667708 53.783420,-1.667343 53.783414,-1.667345 53.783388,-1.667264 53.783404,-1.666923 53.783427,-1.666888 53.783437,-1.666860 53.783462,-1.666471 53.783457,-1.666514 53.783089,-1.666512 53.782839,-1.666530 53.782556,-1.665643 53.782657,-1.665160 53.782720,-1.664721 53.782756,-1.664071 53.782850,-1.663044 53.782958,-1.662738 53.783006,-1.662726 53.782899,-1.662689 53.782852,-1.662369 53.782879,-1.662221 53.782907,-1.662163 53.782905,-1.662103 53.782880,-1.662027 53.782877,-1.661955 53.782895,-1.661876 53.782940,-1.661813 53.782957,-1.661286 53.783011,-1.660969 53.783085,-1.660457 53.783191,-1.660156 53.783220,-1.660165 53.783236,-1.660090 53.783389,-1.660027 53.783629,-1.659991 53.783858,-1.659990 53.783927,-1.660029 53.784143,-1.660063 53.784245,-1.660252 53.784662,-1.660287 53.784704,-1.660366 53.784757,-1.660708 53.784940,-1.660784 53.784987,-1.660858 53.785045,-1.661013 53.785080,-1.660988 53.785125,-1.660985 53.785147,-1.660986 53.785166,-1.661006 53.785195,-1.661095 53.785247,-1.661308 53.785345,-1.661572 53.785118,-1.661632 53.785055,-1.661755 53.784889,-1.664562 53.785126,-1.665390 53.785252,-1.665389 53.785259,-1.666046 53.785364,-1.666090 53.785404,-1.666178 53.785393,-1.667617 53.785601,-1.667666 53.785520,-1.667768 53.785390,-1.668832 53.785498,-1.669210 53.784840,-1.669328 53.784591,-1.669397 53.784423,-1.669539 53.783855,-1.669842 53.783868,-1.669987 53.783883,-1.670005 53.783750,-1.670021 53.783480,-1.668570 53.783467,-1.668351 53.783478)))	POINT (-1.664839 53.784105)		2026-02-04	Invalid date
CA010	SEACROFT - DAWSONS COURT		https://www.leeds.gov.uk/sites/default/files/files-imported/816f0cd3b93aa0d1117ad674c88a31e0f6e2a88cf3d94990d0bb4b47d87a8e83.pdf	https://www.leeds.gov.uk/planning/conservation-protection-and-heritage/conservation-area	MULTIPOLYGON (((-1.455765 53.815571,-1.455690 53.815570,-1.455692 53.815602,-1.455707 53.815621,-1.455682 53.815640,-1.455740 53.815712,-1.455783 53.815874,-1.455788 53.815919,-1.455741 53.815924,-1.455777 53.816060,-1.455764 53.816062,-1.455883 53.816331,-1.455764 53.816350,-1.455812 53.816488,-1.455817 53.816543,-1.455783 53.816658,-1.455731 53.816677,-1.455750 53.816695,-1.455725 53.816728,-1.455735 53.816731,-1.455660 53.816797,-1.455741 53.816826,-1.455741 53.816846,-1.455818 53.816853,-1.455797 53.816961,-1.456052 53.816962,-1.456171 53.816953,-1.456339 53.816929,-1.456543 53.816876,-1.456788 53.817251,-1.456835 53.817241,-1.457097 53.817279,-1.457485 53.817031,-1.457201 53.816846,-1.456910 53.816631,-1.456704 53.816459,-1.456538 53.816299,-1.456435 53.816182,-1.456322 53.816017,-1.456086 53.815582,-1.455927 53.815567,-1.455765 53.815571)))	POINT (-1.456375 53.816528)		2026-02-04	Invalid date

How to fix this issue

Your dataset is missing the start-date column.

The Conservation area guidance explains how to fix the issue:

start-date

The date the validity of the record starts, written in YYYY-MM-DD format. Usually, this will be the same as the designation date. If anything about the conservation area has changed, for example, the boundary, it should be the date of that change.

Example:

1984-04-25

With dates, some data is better than no data, so:

1984 is fine
1984-04 is better
1984-04-25 is brilliant

How to improve Leeds City Council’s data

Fix the errors indicated
Use the check service to make sure the data meets the standard
Publish the updated data on the endpoint URL