EC 8376 then EC 8065 at Gatwick
Milan → London → Barcelona
Timetable, London time
19:25EC 8376 from Milan at the gate
09:10EC 8065 to Barcelona leaves the gate
13 h 45 apart on the timetable, overnight
EC 8065 leaves 13 h 45 after EC 8376 arrives on the timetable: more than half a day, so not a connection we count.