Data often isn't available as data
Often even the most basic information often isn’t available as data. For example, every local planning authority should publish a local plan, but there isn’t an authoritative list of local planning authorities, and there isn’t a single list of local plans.
The best public list of local planning authorities we’ve found is a PDF published by the planning inspectorate, but the data in this is text, which requires effort and care to process. Ideally this would be a register with links to local authorities, development area and national park registers and the local plans themselves.