BA 1367 then BA 486 at Heathrow
Manchester → London → Barcelona
Timetable, London time
14:10BA 1367 from Manchester at the gate
14:00BA 486 to Barcelona leaves the gate
23 h 50 apart on the timetable, overnight
BA 486 leaves 23 h 50 after BA 1367 arrives on the timetable: more than half a day, so not a connection we count.