IB 983 then U2 8285 at Gatwick
Madrid → London → Catania
Timetable, London time
10:50IB 983 from Madrid at the gate
07:25U2 8285 to Catania leaves the gate
20 h 35 apart on the timetable, overnight
U2 8285 leaves 20 h 35 after IB 983 arrives on the timetable: more than half a day, so not a connection we count.