FR 7120 then FR 340 at Dublin
Tenerife South → Dublin → London Luton
Timetable, Dublin time
00:55FR 7120 from Tenerife South at the gate
20:55FR 340 to London Luton leaves the gate
20 h apart on the timetable
FR 340 leaves 20 h after FR 7120 arrives on the timetable: more than half a day, so not a connection we count.