From BA.com :-
We are very sorry to our customers for the disruption to their travel plans.
We are working as quickly as possible to resolve a systems issue which has resulted in some short-haul cancellations and delays from London airports.
We are offering customers booked on short-haul services departing from Heathrow, Gatwick and London City today, the opportunity to rebook to another day.
So, BA are somehow managing not to cancel flights from outstations, even though the outbound flights from London have been cancelled. Amazing!
