BA 1347 then BA 830 at Heathrow
Saint Helier → London → Dublin
Timetable, London time
11:50BA 1347 from Saint Helier at the gate
11:05BA 830 to Dublin leaves the gate
23 h 15 apart on the timetable, overnight
BA 830 leaves 23 h 15 after BA 1347 arrives on the timetable: more than half a day, so not a connection we count.