U2 8050 then U2 837 at Gatwick
Milan → London → Belfast International
Timetable, London time
07:45U2 8050 from Milan at the gate
20:30U2 837 to Belfast International leaves the gate
12 h 45 apart on the timetable
U2 837 leaves 12 h 45 after U2 8050 arrives on the timetable: more than half a day, so not a connection we count.