U2 2707 then U2 2306 at Madrid
Bristol → Madrid → London Luton
Timetable, Madrid time
19:45U2 2707 from Bristol at the gate
10:35U2 2306 to London Luton leaves the gate
14 h 50 apart on the timetable, overnight
U2 2306 leaves 14 h 50 after U2 2707 arrives on the timetable: more than half a day, so not a connection we count.