SN 243 then BA 391 at Brussels
Freetown → Brussels → London Heathrow
Timetable, Brussels time
06:20SN 243 from Freetown at the gate
14:00BA 391 to London Heathrow leaves the gate
7 h 40 apart on the timetable
The last days
SN 243 and BA 391 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.