BA 1358 then FR 6596 at Manchester
London Heathrow → Manchester → Barcelona
Timetable, Manchester time
07:55BA 1358 from London Heathrow at the gate
06:30FR 6596 to Barcelona leaves the gate
22 h 35 apart on the timetable, overnight
FR 6596 leaves 22 h 35 after BA 1358 arrives on the timetable: more than half a day, so not a connection we count.