W4 6315 then FR 9015 at Barcelona
Milan → Barcelona → London Stansted
Timetable, Barcelona time
12:25W4 6315 from Milan at the gate
12:20FR 9015 to London Stansted leaves the gate
23 h 55 apart on the timetable, overnight
FR 9015 leaves 23 h 55 after W4 6315 arrives on the timetable: more than half a day, so not a connection we count.