FR 1983 then FR 666 at Dublin
Biarritz → Dublin → Birmingham (UK)
Timetable, Dublin time
17:20FR 1983 from Biarritz at the gate
12:15FR 666 to Birmingham (UK) leaves the gate
18 h 55 apart on the timetable, overnight
FR 666 leaves 18 h 55 after FR 1983 arrives on the timetable: more than half a day, so not a connection we count.