U2 8720 then EC 8065 at Gatwick
Copenhagen → London → Barcelona
Timetable, London time
11:30U2 8720 from Copenhagen at the gate
09:10EC 8065 to Barcelona leaves the gate
21 h 40 apart on the timetable, overnight
EC 8065 leaves 21 h 40 after U2 8720 arrives on the timetable: more than half a day, so not a connection we count.