U2 8056 then U2 8285 at Gatwick
Barcelona → London → Catania
Timetable, London time
11:50U2 8056 from Barcelona at the gate
07:25U2 8285 to Catania leaves the gate
19 h 35 apart on the timetable, overnight
U2 8285 leaves 19 h 35 after U2 8056 arrives on the timetable: more than half a day, so not a connection we count.