FR 5020 then FR 306 at Dublin
Pisa → Dublin → London Gatwick
Timetable, Dublin time
15:40FR 5020 from Pisa at the gate
14:45FR 306 to London Gatwick leaves the gate
23 h 05 apart on the timetable, overnight
FR 306 leaves 23 h 05 after FR 5020 arrives on the timetable: more than half a day, so not a connection we count.