From whom? There has never been anyone to claim independence from.
Its constituent countries have sometimes been ruled by foreign nations - I suppose when the Romans left, 411 AD, England became independent from them.
It has never needed to do so. It has been self governed since its formation.
The United Kingdom
The United Kingdom.
The United Kingdom
The United Kingdom
United kingdom
Kingdom of Great Britain
Belize gained complete independence from the United Kingdom.
The United Kingdom
united kingdom
Independence from the United Kingdom.
It got its independence from United Kingdom.
Independence from the United Kingdom.