All BA franchise agreements have an early termination clause in them to cover a potentially unfriendly change of ownership. Whilst no-one can predict what BA will do, they could invoke this and force a change within (I think) a month to disenfranchise BMed. It is effectively treated as a breach of the franchise if there is an unfriendly change (i.e. much faster termination), rather than a termination through normal means which has a longer notice period attached.