In the United Kingdom, The Queen's title includes the words 'Defender of the Faith'.

This means Her Majesty has a specific role in both the Church of England and the Church of Scotland.

As established Churches, they are recognised by law as the official Churches of England and Scotland, respectively. In both England and Scotland, the established Churches are subject to the regulation of law. The principle of religious toleration is fully recognised both for those of other creeds and for those without any religious beliefs.
 
There are no established Churches in Northern Ireland nor in Wales. They were disestablished in 1869 in Northern Ireland and 1920 in Wales. There is no established Church in any Commonwealth country of which The Queen is monarch (i.e. a realm).

In addition to playing a role in the Churches of England and Scotland, The Queen recognises and supports the various other faiths practised in the UK and Commonwealth.