JL 43 then BA 1334 at Heathrow
Tokyo → London → Newcastle
Timetable, London time
15:15JL 43 from Tokyo at the gate
14:40BA 1334 to Newcastle leaves the gate
23 h 25 apart on the timetable, overnight
BA 1334 leaves 23 h 25 after JL 43 arrives on the timetable: more than half a day, so not a connection we count.