VY 7614 then U2 8309 at Gatwick
Barcelona → London → Milan
Timetable, London time
15:15VY 7614 from Barcelona at the gate
14:40U2 8309 to Milan leaves the gate
23 h 25 apart on the timetable, overnight
U2 8309 leaves 23 h 25 after VY 7614 arrives on the timetable: more than half a day, so not a connection we count.