BA 349 then EI 159 at Heathrow
Nice → London → Dublin
Timetable, London time
14:05BA 349 from Nice at the gate
12:10EI 159 to Dublin leaves the gate
22 h 05 apart on the timetable, overnight
EI 159 leaves 22 h 05 after BA 349 arrives on the timetable: more than half a day, so not a connection we count.