Before you pack: Burkina Faso uses Types C and E, 230 V and 50 Hz. At 230 V the supply matches what UK and European appliances expect, so no converter is needed.
The same socket system is used in Congo, the Western Sahara, Mali and Mauritania, so one adapter covers all of them. Nearby but different: Sierra Leone, Nigeria and Tanzania – an adapter for Burkina Faso will not fit there. Across Africa this setup is common: 21 of 55 countries.
Protective earth
Grounded and ungrounded sockets may occur
Not every socket in Burkina Faso is earthed: Type E yes, Type C no. Class I appliances belong in an earthed outlet.