Conservation area

There is a problem

start-date column must be in YYYY-MM-DD format

Three Sisters

reference: 3950
name: Three Sisters
designation-date
document-url: https://www.wandsworth.gov.uk/media/1690/three_sisters.pdf
documentation-url: https://www.wandsworth.gov.uk/planning-and-building-control/building-conservation-and-design/conservation-areas/conservation-area-appraisals/
geometry: MULTIPOLYGON (((-0.171654 51.472701,-0.166556 51.473697,-0.166723 51.473803,-0.166877 51.473922,-0.167761 51.473736,-0.167889 51.473916,-0.168636 51.474843,-0.168632 51.474904,-0.169113 51.474937,-0.169342 51.474968,-0.169616 51.475018,-0.170536 51.474704,-0.172491 51.474188,-0.172495 51.474172,-0.172472 51.474128,-0.172412 51.474044,-0.172433 51.474040,-0.172307 51.473826,-0.172683 51.473770,-0.172239 51.472629,-0.171654 51.472701)))
point: POINT (-0.170165 51.473817)
notes: Appraisal
organisation
entry-date: 2025-04-01
start-date: start-date must be a real date
2009-03-03
end-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 Historic England’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