BA 1333 then BA 1424 at Heathrow
Newcastle → London → Inverness
Timetable, London time
18:00BA 1333 from Newcastle at the gate
17:15BA 1424 to Inverness leaves the gate
23 h 15 apart on the timetable, overnight
BA 1424 leaves 23 h 15 after BA 1333 arrives on the timetable: more than half a day, so not a connection we count.