FR 5564 then EI 174 at Dublin
Glasgow → Dublin → London Heathrow
Timetable, Dublin time
21:50FR 5564 from Glasgow at the gate
16:30EI 174 to London Heathrow leaves the gate
18 h 40 apart on the timetable, overnight
EI 174 leaves 18 h 40 after FR 5564 arrives on the timetable: more than half a day, so not a connection we count.