It wasn't overbooked, it was above MTOW.
Please forgive me if this is a stupid question and don't shoot me down...
But how can a flight like Gatwick to Brindisi exceed the aircrafts MTOW? easyJet operate far longer sectors than this, and these fights are full too. The only cargo would be customers hold luggage, as the airline doesn't carry other cargo - Does it?
We have had no hot weather to effect take off performance in the last few days, and Gatwick's long runway should not restrict a fully loaded A319/320.
Im just asking out of curousity, as my technical knowledge on what caused the issue is limited.