Originally Posted by
ratechaser
To anyone saying that it's nothing to do with BA, I think where it could be relevant is where BA planes are scheduled to land anywhere in the EU at about the same time as a bunch of other UK flights. Because all other things being equal, these are going to be the major congestion points to watch out for/avoid in future.
It's not just about scheduling around other UK arrivals, it's also about other non EU arrivals too. Then of course this doesn't take into consideration any subsequent delay on the day. Just because the schedule says you're not going to arrive near to another non-EU arrival that on the day your flight doesn't land ahead or behind schedule or that Aeroflot A330 that should be processed by the time you arrive isn't running late.