Data are provided by "Upper Tier Local Authorities" in England & Northern Ireland, and by Health Board in Wales & Scotland. This map shows Local Authorities. In cases where the raw data are provided for a combination of Local Authorities (i.e. for Health Boards or some Upper Tier Local Authorities), each Local Authority in that group is given the same per-capita value (UK geography is hard).
The date shown above is the most recent date for any UTLA. In practice, English UTLAs can be a day behind this. Check the UTLA JSON file for details of each UTLA.
This hexmap was deprecated on 31st July 2020 as Tom White's excellent compilation of UK-wide local data stopped being maintained. Tom has done an excellent volunteer job over the past five months maintaining this data and has now, understandably, stopped. Ideally someone in central Government would be compiling consistent, local-level, time-series data across the whole of the UK.