FR 121 then FR 4501 at Dublin
London Gatwick → Dublin → Cologne
Timetable, Dublin time
19:15FR 121 from London Gatwick at the gate
11:05FR 4501 to Cologne leaves the gate
15 h 50 apart on the timetable, overnight
FR 4501 leaves 15 h 50 after FR 121 arrives on the timetable: more than half a day, so not a connection we count.