jdcg wrote "Surely now is a good time to stick with STN now that BAA are obliged to sell and with a new buyer likely to try and compete more aggressively..?"
Alternately, threaten to pull out as a negotiating tactic to get a better deal with BAA prior to the new owners taking over. FR provide a substantial cash flow for STN, and the loss of the airline would badly affect the price BAA could realise from the enforced sale.
MD