FR 776 then FR 8231 at Barcelona
Venezia → Barcelona → London Stansted
Timetable, Barcelona time
14:55FR 776 from Venezia at the gate
14:00FR 8231 to London Stansted leaves the gate
23 h 05 apart on the timetable, overnight
FR 8231 leaves 23 h 05 after FR 776 arrives on the timetable: more than half a day, so not a connection we count.