Why is this claim made, and is it correct? Whilst it is true that the idea of a separation of powers in the United Kingdom as an element of the existing constitution is a disputed one, it is clear that there are several leading opinions as to the extent to which the United Kingdom conforms to any model, the nature of this model, as well as the reasoning behind separation of powers. It is contested whether the position of the UK, in which exists a certain amount of fusion between the executive, the legislative and the judicial functions, can be considered to have a separation of powers in the ‘pure’ sense. It is a theoretical feature of any separation that ‘Parliament, the executive and the courts have each their distinct and largely exclusive domain. Parliament has a legally unchallengeable right to make whatever laws it thinks right