BJ 280 then BA 955 at Munich
Tunis → Munich → London Heathrow
Timetable, Munich time
08:45BJ 280 from Tunis at the gate
20:50BA 955 to London Heathrow leaves the gate
12 h 05 apart on the timetable
BA 955 leaves 12 h 05 after BJ 280 arrives on the timetable: more than half a day, so not a connection we count.