EC 8302 then U2 8285 at Gatwick
Milan → London → Catania
Timetable, London time
08:50EC 8302 from Milan at the gate
07:25U2 8285 to Catania leaves the gate
22 h 35 apart on the timetable, overnight
U2 8285 leaves 22 h 35 after EC 8302 arrives on the timetable: more than half a day, so not a connection we count.