FR 7120 then BA 839 at Dublin
Tenerife South → Dublin → London Heathrow
Timetable, Dublin time
00:45FR 7120 from Tenerife South at the gate
20:40BA 839 to London Heathrow leaves the gate
19 h 55 apart on the timetable
BA 839 leaves 19 h 55 after FR 7120 arrives on the timetable: more than half a day, so not a connection we count.