UL 505 then BA 320 at Heathrow
Colombo → London → Paris Charles de Gaulle
Timetable, London time
08:40UL 505 from Colombo at the gate
19:00BA 320 to Paris Charles de Gaulle leaves the gate
10 h 20 apart on the timetable
The last days
UL 505 and BA 320 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.