FR 275 then FR 306 at Dublin
Glasgow → Dublin → London Gatwick
Timetable, Dublin time
21:40FR 275 from Glasgow at the gate
14:45FR 306 to London Gatwick leaves the gate
17 h 05 apart on the timetable, overnight
FR 306 leaves 17 h 05 after FR 275 arrives on the timetable: more than half a day, so not a connection we count.