I can understand all this talk about 'London Airways', but that's wrong - it's really Heathrow Airways, or T5/3-wait-a-minute-T4 Airways.
Look at LGW - handed over to easyJet in large part.
Look at LCY - never taken seriously, so it's now an AFKL hub.
Look at STN - I think BA had a flight once.
Look at LTN - nothing since IOM went the way of all flesh.
So it's not just the other domestic airports BA has abandoned.