U2 803 then U2 819 at Gatwick
Edinburgh → London → Belfast International
Timetable, London time
15:15U2 803 from Edinburgh at the gate
08:35U2 819 to Belfast International leaves the gate
17 h 20 apart on the timetable, overnight
U2 819 leaves 17 h 20 after U2 803 arrives on the timetable: more than half a day, so not a connection we count.