BA 1473 then BA 1348 at Heathrow
Glasgow → London → Saint Helier
Timetable, London time
10:30BA 1473 from Glasgow at the gate
08:35BA 1348 to Saint Helier leaves the gate
22 h 05 apart on the timetable, overnight
BA 1348 leaves 22 h 05 after BA 1473 arrives on the timetable: more than half a day, so not a connection we count.