FR 420 then BA 8454 at Schiphol
Dublin → Amsterdam → London City
Timetable, Amsterdam time
18:55FR 420 from Dublin at the gate
16:20BA 8454 to London City leaves the gate
21 h 25 apart on the timetable, overnight
BA 8454 leaves 21 h 25 after FR 420 arrives on the timetable: more than half a day, so not a connection we count.