Sockets in Senegal: Types C and E, supplied with 230 V at 50 Hz. No surprises on voltage: Senegal runs at 230 V, the same range as at home in the UK.
You will find identical sockets in Togo, the Comoros, Congo, The Democratic Republic of the and Cameroon. Watch out when moving on: the Seychelles, Zimbabwe and Kenya use a completely different system. Across Africa this setup is common: 21 of 55 countries.
Protective earth
Grounded and ungrounded sockets may occur
Mixed supply: Type C without earth, Type E with earth. Which one is in your room only shows on arrival.