FR 3881 then FR 120 at Dublin
Dubrovnik → Dublin → London Gatwick
Timetable, Dublin time
14:15FR 3881 from Dubrovnik at the gate
07:50FR 120 to London Gatwick leaves the gate
17 h 35 apart on the timetable, overnight
FR 120 leaves 17 h 35 after FR 3881 arrives on the timetable: more than half a day, so not a connection we count.