You Do Need power plug adapter while traveling from Côte d'Ivoire (Ivory Coast) to Great Britain.

Here is Why You Need An Adapter

The outlet and plug type used in Great Britain is G and in Côte d'Ivoire (Ivory Coast) are C and E. This is how they look like.

Côte d'Ivoire (Ivory Coast)

In Côte d'Ivoire (Ivory Coast), outlets of type C and E are in use.

Type C

Type E

Great Britain

In Great Britain, outlets of type G are in use.

Type G