BA 1345 then BA 1484 at Heathrow
Saint Peter Port → London → Glasgow
Timetable, London time
14:55BA 1345 from Saint Peter Port at the gate
14:30BA 1484 to Glasgow leaves the gate
23 h 35 apart on the timetable, overnight
BA 1484 leaves 23 h 35 after BA 1345 arrives on the timetable: more than half a day, so not a connection we count.