it is not in BAA’s interest to run the place down.
yes it is for two reasons
1) The entire BAA argument for not selling stansted was that it did not compete with Heathrow as they served two entirely different markets. Heathrow is a full service airport with a transfer product and Stansted is a low cost point to point airport. Any sign of any full service carriers showing interest in Stansted would have to be discouraged to avoid undermining their argument
2) They are not likely to invest significant amounts of money in an asset they may be forced to sell possibly at a knock down price. I understand that even the staff uniforms are unbranded now in the expectation of a sale.