U2 802 then EC 8065 at Gatwick
Belfast City → London → Barcelona
Timetable, London time
21:30U2 802 from Belfast City at the gate
14:50EC 8065 to Barcelona leaves the gate
17 h 20 apart on the timetable, overnight
EC 8065 leaves 17 h 20 after U2 802 arrives on the timetable: more than half a day, so not a connection we count.