BA 717 then BA 1338 at Heathrow
Zurich → London → Newcastle
Timetable, London time
17:15BA 717 from Zurich at the gate
16:05BA 1338 to Newcastle leaves the gate
22 h 50 apart on the timetable, overnight
BA 1338 leaves 22 h 50 after BA 717 arrives on the timetable: more than half a day, so not a connection we count.