Told you it was complex!
I got it all completely wrong by the look of it! Sorry about that. But it does go to show that the BBC's regions have been pretty messed up over the years.
Not really - the actual English regions have hardly changed at all - though the move from VHF to UHF changed a few boundaries, especially as some regions main transmitters were relocated.
The major evolutionary changes over the years have been :
The moving of the Cumbria region between Manchester and Newcastle based programmes.
The split of East and West Midlands - initially a sub-opt then a full-opt out of Nottingham.
The addition of a sub-opt for the West of the East region - a sub-opt out of Cambridge.
The addition of a sub-opt, then a full-opt for part of the North (aka Yorks and Lincs) region, out of Hull.
The split of the South East aka London and South East region into an Oxford sub-opt, a full-opt from Tunbridge Wells and a full-opt from London.
The expansion of the Channel Islands service from a 2128 only bulletin to a sub-opt at 1830 and a full 2230 bulletin out of Jersey.
With the exception of the Cumbria issue - all of the other changes have been to increase the "localness" of the news - and the BBC is committed to continuing this. The proposed MK region - which AFAIK is just a re-location and expansion of the current Cambridge sub-opt for the Look East region (and not a merger with the South Today Oxford operation) to match the Anglia News West patch.