U2 8056 then U2 819 at Gatwick
Barcelona → London → Belfast International
Timetable, London time
12:10U2 8056 from Barcelona at the gate
08:35U2 819 to Belfast International leaves the gate
20 h 25 apart on the timetable, overnight
U2 819 leaves 20 h 25 after U2 8056 arrives on the timetable: more than half a day, so not a connection we count.