DY 3510 then U2 8821 at Gatwick
Copenhagen → London → Krakow
Timetable, London time
09:25DY 3510 from Copenhagen at the gate
06:35U2 8821 to Krakow leaves the gate
21 h 10 apart on the timetable, overnight
U2 8821 leaves 21 h 10 after DY 3510 arrives on the timetable: more than half a day, so not a connection we count.