FR 6874 then FR 116 at Dublin
Barcelona → Dublin → London Gatwick
Timetable, Dublin time
21:40FR 6874 from Barcelona at the gate
11:35FR 116 to London Gatwick leaves the gate
13 h 55 apart on the timetable, overnight
FR 116 leaves 13 h 55 after FR 6874 arrives on the timetable: more than half a day, so not a connection we count.