FR 6597 then BA 1367 at Manchester
Barcelona → Manchester → London Heathrow
Timetable, Manchester time
19:50FR 6597 from Barcelona at the gate
12:55BA 1367 to London Heathrow leaves the gate
17 h 05 apart on the timetable, overnight
BA 1367 leaves 17 h 05 after FR 6597 arrives on the timetable: more than half a day, so not a connection we count.