International signalling.  As a government, the UK aims to promote democracy in the international community while reducing the number of countries adhering to other forms of government that do not listen to their people. This includes opposition to theocracies, where the country is run by a religious group according to religious doctrines, particularly in the case of Iran.  It is difficult for the UK to legitimately condemn such a governmental system while the Church of England has such a heavy role in the running of its own government. Although these are not on the same level, it can still be perceived as hypocrisy by the international community and the separation of church and state would greatly benefit the UK’s ability to condemn these states.