Don’t require power plug adapter while traveling from Ireland (Eire) to Great Britain.

Here's why you do not need an adapter

The outlet and plug type used in Great Britain is G and in Ireland (Eire) is G and they are compatible with each other.

Ireland (Eire)

In Ireland (Eire), outlets of type G are in use.

Type G

Great Britain

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

Type G