U2 2323 then VY 6012 at Barcelona
London Luton → Barcelona → Rome
Timetable, Barcelona time
20:10U2 2323 from London Luton at the gate
14:40VY 6012 to Rome leaves the gate
18 h 30 apart on the timetable, overnight
VY 6012 leaves 18 h 30 after U2 2323 arrives on the timetable: more than half a day, so not a connection we count.