There are some theories that the United Kingdom being involved in the European union restricts the idea of parliament sovereignty, this being that the fact parliament is no longer the supreme law maker, as they have to involve European laws into the United Kingdom so the fact that parliament didn't make the law goes against the quote 'What the Queen in Parliament enacts is law'.
The British constitution can be summed up in eight words, "what the queen in parliament enacts is law". This means that parliament using the crown, enacts law what no other body can challenge. In A.V. Dicey main theory in the law of constitution 1885 ; witch is sometimes seen as an out dated theory being one hundred and