Leader of the Opposition, Keir Starmer, has stated in the HoC that an RAF evacuation flight has left Afghanistan mostly empty and asked that this “allegation” be investigated.
Not sure he realised that like, trains, such aircraft can’t just sit waiting in the ground until the ground staff fill it up.
Ignoring the doubtless limited pan space being booked for use by incoming US, German, Spanish etc aircraft, the crew of the aircraft in question will be watching the clock on their own crew duty day time - and the arrival airfield will have a slot time for their arrival with another relief crew waiting, probably to bring it back again for yet another cycle., along wit( whatever supplies those on the ground need to continue operations.
If the hard stretched troops on the ground haven’t either had enough people reach the airport to put in board, or time to clear those who have recently arrived - then it departs with those few who have.