BA 713 then KL 9936 at Heathrow
Zurich → London → Amsterdam
Timetable, London time
14:30BA 713 from Zurich at the gate
14:27KL 9936 to Amsterdam leaves the gate
23 h 57 apart on the timetable, overnight
KL 9936 leaves 23 h 57 after BA 713 arrives on the timetable: more than half a day, so not a connection we count.