FR 507 then BA 827 at Dublin
Bristol → Dublin → London Heathrow
Timetable, Dublin time
20:15FR 507 from Bristol at the gate
15:10BA 827 to London Heathrow leaves the gate
18 h 55 apart on the timetable, overnight
BA 827 leaves 18 h 55 after FR 507 arrives on the timetable: more than half a day, so not a connection we count.