BA 1383 then BA 754 at Heathrow
Manchester → London → Basel
Timetable, London time
08:00BA 1383 from Manchester at the gate
07:35BA 754 to Basel leaves the gate
23 h 35 apart on the timetable, overnight
BA 754 leaves 23 h 35 after BA 1383 arrives on the timetable: more than half a day, so not a connection we count.