EC 3749 then IB 5416 at Barcelona
Milan → Barcelona → London Gatwick
Timetable, Barcelona time
21:30EC 3749 from Milan at the gate
17:35IB 5416 to London Gatwick leaves the gatealso LL 5416, VY 7620, BA 8074
20 h 05 apart on the timetable, overnight
IB 5416 leaves 20 h 05 after EC 3749 arrives on the timetable: more than half a day, so not a connection we count.