FR 5556 then BA 835 at Dublin
Tenerife South → Dublin → London Heathrow
Timetable, Dublin time
20:30FR 5556 from Tenerife South at the gate
18:00BA 835 to London Heathrow leaves the gate
21 h 30 apart on the timetable, overnight
BA 835 leaves 21 h 30 after FR 5556 arrives on the timetable: more than half a day, so not a connection we count.