BA 1349 then EI 159 at Heathrow
Saint Helier → London → Dublin
Timetable, London time
16:20BA 1349 from Saint Helier at the gate
12:10EI 159 to Dublin leaves the gate
19 h 50 apart on the timetable, overnight
EI 159 leaves 19 h 50 after BA 1349 arrives on the timetable: more than half a day, so not a connection we count.