BA 873 then BA 1334 at Heathrow
Krakow → London → Newcastle
Timetable, London time
18:05BA 873 from Krakow at the gate
14:40BA 1334 to Newcastle leaves the gate
20 h 35 apart on the timetable, overnight
BA 1334 leaves 20 h 35 after BA 873 arrives on the timetable: more than half a day, so not a connection we count.