I live in Teddington, about 7 km south west of the eastern end of Heathrow. I don't know all the factors that determine the routes that departing Aircraft can take, but on numerous occasions aircraft fly almost right over my home.
It's never really bother me (in fact I miss heading Concorde during it's take off) and I've become accustomed to the noise, however, for the first time in the seven years I've lived there I was woken up by a departing aircraft. The Aircraft in question passed overhead at 0145 this morning (Monday 3rd). I was probably just a combination of being woken and the general level of quietness at this hour of the morning, but it seemed to be the loudest aircraft I'd ever heard at home (well, since Concorde, and that never flew over my home).
So my question is, what time does the last flight leave Heathrow? I thought it was round about midnight, so have I been mistaken all these years, or was this an unusually late departure by a large aircraft?