BA 349 then BA 1484 at Heathrow
Nice → London → Glasgow
Timetable, London time
21:05BA 349 from Nice at the gate
14:20BA 1484 to Glasgow leaves the gate
17 h 15 apart on the timetable, overnight
BA 1484 leaves 17 h 15 after BA 349 arrives on the timetable: more than half a day, so not a connection we count.