Those who have been on them before...
There is a departure from Town at 23:40 which gets to Heathrow for 05:45.
Do they usually stick to a strict timetable (I know they have to call at other locations on the way down) or do they usually arrive at destinations early, because if I was to go on this, it would be perfect timing for my flight, but it if there was any delays en route, then it might be a little bit tight.