It's disappointing that the Competition Commission couldn't see that Stansted serves quite a different market to Heathrow, and in fact seems to have been in decline for some years now (the pax numbers certainly have), whereas Heathrow keeps squeezing upwards. Mainstream carriers, as opposed to low costs, have made many attempts to operate their services out of Stansted, and every single one has been a commercial disaster and ended up being binned. Even Easyjet are in retreat here.
I'm no supporter of BAA, but somw ill-informed government quango has caused yet more investment money from the aviation industry to be poured down the drain in now having to sell the place (you never get anything like the money in an enforced sale as you do when you sell at your own choosing). I really doubt they'll get much for it.