BA 1349 then BA 410 at Heathrow
Saint Helier → London → Valencia
Timetable, London time
16:20BA 1349 from Saint Helier at the gate
15:15BA 410 to Valencia leaves the gate
22 h 55 apart on the timetable, overnight
BA 410 leaves 22 h 55 after BA 1349 arrives on the timetable: more than half a day, so not a connection we count.