BA 1485 then JL 44 at Heathrow
Glasgow → London → Tokyo
Timetable, London time
19:00BA 1485 from Glasgow at the gate
18:30JL 44 to Tokyo leaves the gate
23 h 30 apart on the timetable, overnight
JL 44 leaves 23 h 30 after BA 1485 arrives on the timetable: more than half a day, so not a connection we count.