BAA are keeping quiet because they know that anything they say will be blasted across the papers. Whilst there has been criticism of them in all media outlets, they have not been shown stammering apologies in front of Jeremy Paxman. In other words, an extremely sensible approach. Despicable - but sensible.
Fortunately, the break up of BAA is now inevitable. Yet another monopoly turned commercial and maintained by the Conservatives that has failed to deliver long term value to the UK.