BA 1447 then BA 1334 at Heathrow
Edinburgh → London → Newcastle
Timetable, London time
15:00BA 1447 from Edinburgh at the gate
14:25BA 1334 to Newcastle leaves the gate
23 h 25 apart on the timetable, overnight
BA 1334 leaves 23 h 25 after BA 1447 arrives on the timetable: more than half a day, so not a connection we count.