FR 657 then BA 389 at Brussels
Dublin → Brussels → London Heathrow
Timetable, Brussels time
15:50FR 657 from Dublin at the gate
11:45BA 389 to London Heathrow leaves the gate
19 h 55 apart on the timetable, overnight
BA 389 leaves 19 h 55 after FR 657 arrives on the timetable: more than half a day, so not a connection we count.