BA 785 then BA 756 at Heathrow
Stockholm → London → Basel
Timetable, London time
09:35BA 785 from Stockholm at the gate
09:25BA 756 to Basel leaves the gate
23 h 50 apart on the timetable, overnight
BA 756 leaves 23 h 50 after BA 785 arrives on the timetable: more than half a day, so not a connection we count.