FR 3793 then IB 5424 at Barcelona
Birmingham (UK) → Barcelona → London Heathrow
Timetable, Barcelona time
20:05FR 3793 from Birmingham (UK) at the gate
18:45IB 5424 to London Heathrow leaves the gatealso LL 5424, VY 7642, BA 8084
22 h 40 apart on the timetable, overnight
IB 5424 leaves 22 h 40 after FR 3793 arrives on the timetable: more than half a day, so not a connection we count.