BA 9118 then BA 770 at Heathrow
Orlando → London → Oslo
Timetable, London time
10:10BA 9118 from Orlando at the gate
10:55BA 770 to Oslo leaves the gate
45 min apart on the timetable
The last days
BA 9118 and BA 770 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.