EC 8424 then U2 8285 at Gatwick
Nice → London → Catania
Timetable, London time
08:05EC 8424 from Nice at the gate
07:25U2 8285 to Catania leaves the gate
23 h 20 apart on the timetable, overnight
U2 8285 leaves 23 h 20 after EC 8424 arrives on the timetable: more than half a day, so not a connection we count.