Conservation area

There is a problem

reference: CA008
name: WOODHOUSE - BLENHEIM SQUARE
designation-date: designation-date must be a real date
document-url: https://www.leeds.gov.uk/sites/default/files/files-imported/2d2734c3cfc7c665b9b3be8e2b6598be2821820a39ca833f39185b94ce077895.pdf
documentation-url: https://www.leeds.gov.uk/planning/conservation-protection-and-heritage/conservation-area
geometry: MULTIPOLYGON (((-1.546925 53.808342,-1.546965 53.808309,-1.548839 53.809270,-1.549137 53.809022,-1.549314 53.808863,-1.549693 53.808495,-1.549241 53.808270,-1.548995 53.808135,-1.548462 53.807862,-1.548065 53.807672,-1.547906 53.807610,-1.547563 53.807535,-1.547332 53.807448,-1.547216 53.807391,-1.546639 53.807071,-1.546224 53.807294,-1.545751 53.807565,-1.546633 53.808105,-1.546676 53.808187,-1.546925 53.808342)))
point: POINT (-1.547786 53.808149)
notes
entry-date: 1978-12-20
start-date: 1978-12-20
end-date

Your dataset is missing the designation-date column.

The Conservation area guidance explains how to fix the issue:

The date that the conservation area was officially designated, written in YYYY-MM-DD format.

Example:

1984-03-28

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