Military flypast over central London tomorrow

Look to the skies, as there’s a flypast of aircraft over central London tomorrow (Thur 5th May) morning.
The central London location is roughly Horse Guards Parade, so expect the planes, whatever it is they are, to be flying over Whitehall at 11:10am on Thursday.
According to the air traffic alert, the turn points for the flypast are as follows (adjusted for British Summer Time).
514500N 0013500WBRIZE NORTON10:43
514631N 0013837WHOLWELL 10:44
514507N 0014422WEASTLEACH TURVILLE10:45
514250N