BA 286 then BA 1334 at Heathrow
San Francisco → London → Newcastle
Timetable, London time
15:10BA 286 from San Francisco at the gate
14:40BA 1334 to Newcastle leaves the gate
23 h 30 apart on the timetable, overnight
BA 1334 leaves 23 h 30 after BA 286 arrives on the timetable: more than half a day, so not a connection we count.