BA 1359 then BA 756 at Heathrow
Manchester → London → Basel
Timetable, London time
10:00BA 1359 from Manchester at the gate
09:25BA 756 to Basel leaves the gate
23 h 25 apart on the timetable, overnight
BA 756 leaves 23 h 25 after BA 1359 arrives on the timetable: more than half a day, so not a connection we count.