For the pedantic only 1 slight continuity guff- G-MARA used for the ALC deperture shots.
Not even a continuity guff - G-MARA was used for the return leg !
They flew out on G-OZBI for the morning flight, and when that returned to Gatwick they lazed by the pool waiting to return on the afternoon flight out of LGW which was operated by G-MARA.
Monarch wouldn't leave a 321 waiting at ALC while celebs sun themselves