BA 1485 then BA 1356 at Heathrow
Glasgow → London → Saint Helier
Timetable, London time
19:00BA 1485 from Glasgow at the gate
18:55BA 1356 to Saint Helier leaves the gate
23 h 55 apart on the timetable, overnight
BA 1356 leaves 23 h 55 after BA 1485 arrives on the timetable: more than half a day, so not a connection we count.