EC 7154 then IB 5834 at Barcelona
Milan → Barcelona → London Gatwick
Timetable, Barcelona time
23:15EC 7154 from Milan at the gate
19:50IB 5834 to London Gatwick leaves the gatealso LL 5834, VY 7626, BA 8080
20 h 35 apart on the timetable, overnight
IB 5834 leaves 20 h 35 after EC 7154 arrives on the timetable: more than half a day, so not a connection we count.