FR 6815 then BA 1367 at Manchester
Madrid → Manchester → London Heathrow
Timetable, Manchester time
16:00FR 6815 from Madrid at the gate
12:55BA 1367 to London Heathrow leaves the gate
20 h 55 apart on the timetable, overnight
BA 1367 leaves 20 h 55 after FR 6815 arrives on the timetable: more than half a day, so not a connection we count.