FR 123 then FR 4501 at Dublin
London Gatwick → Dublin → Cologne
Timetable, Dublin time
15:45FR 123 from London Gatwick at the gate
11:05FR 4501 to Cologne leaves the gate
19 h 20 apart on the timetable, overnight
FR 4501 leaves 19 h 20 after FR 123 arrives on the timetable: more than half a day, so not a connection we count.