If it was not for the Oilfield Trash Dyce would not exist or would exist on state subsidies.
Besides, not so many moons ago you had no alternative other than BA to fly to London. Both BMI and BA charge more or less the same fares. You have alternatives such as EasyJet (to LGW & LTN) as well as FlyBe (LGW).
If you live in Glasgow or Newcastle BA is keeping the route open to Heathrow. There is only competition (of a sort) from ABZ, MAN & EDI. If both BA and BMI charge the same - in reality where is the competition ? In reality UK domestic fares are already through the roof, and will always be. I donīt say the situation is correct but you need to either put up or shut up.
Even if a new airline, or Branson took over BMIīs slots, etc and chose to fly UK domestic, the situation would not change. Itīs commercial sense.
Or does the Scottish government plan to do a Nigerian Government on BA?