EC 8306 then U2 8065 at Gatwick
Milan → London → Barcelona
Timetable, London time
14:15EC 8306 from Milan at the gate
09:10U2 8065 to Barcelona leaves the gate
18 h 55 apart on the timetable, overnight
U2 8065 leaves 18 h 55 after EC 8306 arrives on the timetable: more than half a day, so not a connection we count.