And it is entirely coincident that it provides employment for 100s of SO2 and SO1s who didn't quite make the Command List, yet still want 16+ years of CEA and not really working for a living.I might be misunderstanding your regionality objection.
There are no simple organisations like district HQs that "happen to be there" any more, just Reactive/Adaptive Force Brigades ready to dash off to war/exercise with subordinate RPOCs doing the eternal boring but essential facility management tasks on local Land Training Areas and Ranges (LTAR), talking to local authorities and trying to engage with communities.
On the UK Ops side, there is now an essential requirement for continual good C2 with CIVPOL the whole time - not just when the Bde isn't on exercise or ops. A fcuk up in this area would not be good
Not sure if anything but a complete cluster could result from centralising on either Andover or Aldershot.