You Do Need power plug adapter while traveling from Dominican Republic to Great Britain.

Here is Why You Need An Adapter

The outlet and plug type used in Great Britain is G and in Dominican Republic are A, B and C. This is how they look like.

Dominican Republic

In Dominican Republic, outlets of type A, B and C are in use.

Type A

Type B

Type C

Great Britain

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

Type G