EC 3749 then IB 5856 at Barcelona
Milan → Barcelona → Manchester
Timetable, Barcelona time
21:30EC 3749 from Milan at the gate
17:10IB 5856 to Manchester leaves the gatealso LL 5856, VY 7756, BA 8106
19 h 40 apart on the timetable, overnight
IB 5856 leaves 19 h 40 after EC 3749 arrives on the timetable: more than half a day, so not a connection we count.