U2 8720 then U2 8065 at Gatwick
Copenhagen → London → Barcelona
Timetable, London time
11:35U2 8720 from Copenhagen at the gate
09:10U2 8065 to Barcelona leaves the gate
21 h 35 apart on the timetable, overnight
U2 8065 leaves 21 h 35 after U2 8720 arrives on the timetable: more than half a day, so not a connection we count.