FR 1557 then EI 3402 at Dublin
Manchester → Dublin → Donegal
Timetable, Dublin time
15:25FR 1557 from Manchester at the gate
12:55EI 3402 to Donegal leaves the gate
21 h 30 apart on the timetable, overnight
EI 3402 leaves 21 h 30 after FR 1557 arrives on the timetable: more than half a day, so not a connection we count.