BA 1385 then BA 1394 at Heathrow
Manchester → London → Belfast City
Timetable, London time
08:55BA 1385 from Manchester at the gate
08:40BA 1394 to Belfast City leaves the gate
23 h 45 apart on the timetable, overnight
BA 1394 leaves 23 h 45 after BA 1385 arrives on the timetable: more than half a day, so not a connection we count.