BA timetable
I recall arriving several times in the 80's on the last Friday night inbound BA from LHR (B757's often with BaC1-11 as the back up) to find we parked up at the international gates. The reason was that the aircraft then operated a holiday charter over night to, I think, Faro. it weas back to operate back to LHR in the morning. Good use of resources. I think BD did the same thing from time to time