There has been a number of queries raised relating to BNF code changes between December 2019 data and the release of January 2020 data.
We have therefore taken the opportunity to publish additional mapping files to help customers understand and identify these code changes more easily.
We apologise that it was not possible to publish this information earlier but hope it will be of some help.
BNF Code Changes (Word: 245KB)
January 2020 BNF Code Changes (Excel: 51KB)