U2 860 then U2 837 at Gatwick
Edinburgh → London → Belfast International
Timetable, London time
07:50U2 860 from Edinburgh at the gate
20:30U2 837 to Belfast International leaves the gate
12 h 40 apart on the timetable
U2 837 leaves 12 h 40 after U2 860 arrives on the timetable: more than half a day, so not a connection we count.