You Do Need power plug adapter while traveling from Senegal to United Kingdom (UK).

Here is Why You Need An Adapter

The outlet and plug type used in United Kingdom (UK) is G and in Senegal are C, D, E and K. This is how they look like.

Senegal

In Senegal, outlets of type C, D, E and K are in use.

Type C

Type D

Type E

Type K

United Kingdom (UK)

In United Kingdom (UK), outlets of type G are in use.

Type G