U2 8284 then VY 7613 at Gatwick
Milan → London → Barcelona
Timetable, London time
20:25U2 8284 from Milan at the gate
15:25VY 7613 to Barcelona leaves the gate
19 h apart on the timetable, overnight
VY 7613 leaves 19 h after U2 8284 arrives on the timetable: more than half a day, so not a connection we count.