Permanent evidence briefs
Areas with enough evidence to publish.
150 local-authority briefs currently pass one shared coverage rule. That same rule controls this directory, each permanent page and sitemap membership.
Publication rule
Coverage first, never a place score.
A brief needs an official name and code, Census population evidence and at least three of the four materialised layers used by the shared gate. This directory is not a complete list of UK authorities, and absence from it is not a judgement about an area.