FB 851 then EI 711 at Heathrow
Sofia → London → Cork
Timetable, London time
12:10FB 851 from Sofia at the gate
09:45EI 711 to Cork leaves the gate
21 h 35 apart on the timetable, overnight
EI 711 leaves 21 h 35 after FB 851 arrives on the timetable: more than half a day, so not a connection we count.