I've done it myself coquelet, TRF-STN-AGP and with about an hour and a half between landing at and departing from STN it's just about doable. When I last did it in January we pushed back 25 mins early at TRF and despite having to be deiced we were still in the air 10 mins before scheduled departure time. No need in the summer as there's a direct TRF-AGP.