Originally Posted by
Nansbread
The SIN to LHR leg BA12 cannot be the aircraft serving this sector as it arrives LHR at 05:50 am and would be ridiculous for it to be parked all day at T5 for the night flight.
It can be, if you have a look at the BA Source Jet Tracker often an A380 arrives early morning, sits at LHR all day, then operates out again in the evening. Doesn't happen all the time but it can.