BA 759 then KL 1012 at Heathrow
Basel → London → Amsterdam
Timetable, London time
17:10BA 759 from Basel at the gate
17:05KL 1012 to Amsterdam leaves the gate
23 h 55 apart on the timetable, overnight
KL 1012 leaves 23 h 55 after BA 759 arrives on the timetable: more than half a day, so not a connection we count.