U2 2323 then FR 6822 at Barcelona
London Luton → Barcelona → Birmingham (UK)
Timetable, Barcelona time
20:10U2 2323 from London Luton at the gate
14:35FR 6822 to Birmingham (UK) leaves the gate
18 h 25 apart on the timetable, overnight
FR 6822 leaves 18 h 25 after U2 2323 arrives on the timetable: more than half a day, so not a connection we count.