EC 8062 then U2 819 at Gatwick
Barcelona → London → Belfast International
Timetable, London time
08:55EC 8062 from Barcelona at the gate
08:35U2 819 to Belfast International leaves the gate
23 h 40 apart on the timetable, overnight
U2 819 leaves 23 h 40 after EC 8062 arrives on the timetable: more than half a day, so not a connection we count.