EC 8376 then EC 8063 at Gatwick
Milan → London → Barcelona
Timetable, London time
19:25EC 8376 from Milan at the gate
09:25EC 8063 to Barcelona leaves the gate
14 h apart on the timetable, overnight
EC 8063 leaves 14 h after EC 8376 arrives on the timetable: more than half a day, so not a connection we count.