You Do Need power plug adapter while traveling from Liberia 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 Liberia are A, B, C and F. This is how they look like.

Liberia

In Liberia, outlets of type A, B, C and F are in use.

Type A

Type B

Type C

Type F

United Kingdom (UK)

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

Type G