VY 7640 then BA 1348 at Heathrow
Barcelona → London → Saint Helier
Timetable, London time
09:10VY 7640 from Barcelona at the gate
08:35BA 1348 to Saint Helier leaves the gate
23 h 25 apart on the timetable, overnight
BA 1348 leaves 23 h 25 after VY 7640 arrives on the timetable: more than half a day, so not a connection we count.