Personally I blame the ground staff for not briefing the Sultana and his entourage properly.
Maybe someone should have had the forethought to tell his highnlyness that, generally, the best place to wait for an aircraft to take off is actually onboard the aircraft. Amazingly most passengers seem to grasp this simple concept even without the fawning entourage to assist, encourage and tell them how wonderful they are. Even more startling is that these ordinary passengers have the innate ability to get to the aircraft on time!
In all the years I have been operating out of Heathrow I have to admit I have never seen the VIP centre move, let alone taxi and take off.
Perhaps a Lagos top travel tip for the future?