BA 1391 then LO 282 at Heathrow
Belfast City → London → Warsaw
Timetable, London time
10:45BA 1391 from Belfast City at the gate
10:35LO 282 to Warsaw leaves the gate
23 h 50 apart on the timetable, overnight
LO 282 leaves 23 h 50 after BA 1391 arrives on the timetable: more than half a day, so not a connection we count.