BA 491 then BA 1352 at Heathrow
Gibraltar → London → Saint Helier
Timetable, London time
16:15BA 491 from Gibraltar at the gate
14:50BA 1352 to Saint Helier leaves the gate
22 h 35 apart on the timetable, overnight
BA 1352 leaves 22 h 35 after BA 491 arrives on the timetable: more than half a day, so not a connection we count.