IB 5337 then FR 8215 at Barcelona
Rome → Barcelona → London Stansted
Timetable, Barcelona time
14:25IB 5337 from Rome at the gatealso LL 5337, VY 6007
11:25FR 8215 to London Stansted leaves the gate
21 h apart on the timetable, overnight
FR 8215 leaves 21 h after IB 5337 arrives on the timetable: more than half a day, so not a connection we count.