The Register of Geographic Codes (RGC) is a key product that contains the definitive list of UK statistical geographies. ONS maintains the definitive set of statistical geographies, coordinates the issue of new codes, and maintains the relationship between active and archived code ranges on behalf of the Government Statistical Service. The RGC should be used in conjunction with the Code History Database, available to download separately.We have been notified that an amendment was needed to the Strategic Clinical Networks (23/01/17). (E55000014) London replaced (E55000001) North West and South London and (E55000013) North and East London immediately after the Strategic Clinical Networks were created in 2013.