The Government has published a data standard for brownfield registers entitled Preparing and publishing a register.
The purpose as stated in the introduction to the data standard is:
The Secretary of State has the power to require local planning authorities to provide information from their brownfield land registers in a particular format (see regulation 18(2) of the Town and Country Planning (Brownfield Land Register) Regulations 2017 “the 2017 Regulations”). Local planning authorities will be able to meet the obligation to provide information in a particular format by preparing and publishing their registers in accordance with this document, therefore this document sets out the national data standard that all local planning authorities in England are encouraged to follow in preparing and publishing their brownfield land registers. The data standard has been developed collaboratively by the Department for Communities and Local Government (DCLG), iStandUK and representatives of the local planning authorities that took part in a pilot project in 2016.
It is essential that the registers published by local planning authorities are consistent and published in an open data format to ensure that they can be aggregated by users of the data.