FR 7153 then FR 122 at Dublin
Santander → Dublin → London Gatwick
Timetable, Dublin time
23:35FR 7153 from Santander at the gate
15:55FR 122 to London Gatwick leaves the gate
16 h 20 apart on the timetable, overnight
FR 122 leaves 16 h 20 after FR 7153 arrives on the timetable: more than half a day, so not a connection we count.