You Do Need power plug adapter while traveling from Marshall Islands 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 Marshall Islands are A and B. This is how they look like.

In Marshall Islands, outlets of type A and B are in use.

Type A

Type B

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

Type G

I am from

going to