Can I just add to the debate? Good luck in getting any BA manager to change their minds once a decision has been made. The problem we have is Flt Ops managers don't have the authority to overrule other stupid decisions. The main reason we have these silly restrictions is lack of terminal space and night restrictions at terminal four.{Roll on T5} Unfortunately, BA don't give the captains the authority to overrule these restrictions even when we know we wont have a problem on the day.....So the poor crew is left with the problem of HAVING to depart on time out of the United States {cos they are "time sensitive"} and knowing we are going to land 30 mins ahead of schedule and get a bollocking from our own management for landing early. Whats' a pilot to do?