IB 5353 then FR 8231 at Barcelona
Milan → Barcelona → London Stansted
Timetable, Barcelona time
11:55IB 5353 from Milan at the gate
07:30FR 8231 to London Stansted leaves the gate
19 h 35 apart on the timetable, overnight
FR 8231 leaves 19 h 35 after IB 5353 arrives on the timetable: more than half a day, so not a connection we count.