Parliamentary Sovereignty
Parliament has sovereignty in the UK, which is a principle of the UK constitution that makes Parliament the supreme legal authority in the UK. Through this constitution Parliament has the right to create, amend and remove any law, including common law made by judges, however they cannot create any laws that a future Parliament cannot change. Any Acts made by Parliament is supreme over all other laws for example in court if a case comes before a judge that is relevant to an out of date piece of primary legislation the legislation will prevail unless Parliament expressly or impliedly repeal it. Parliament sovereignty is a subject to the Doctrine of Implied Repeal, which states that if an Act made by the current Parliament conflicts with an old act of Parliament the new act take precedent over the conflicting parts of the old one. The Doctrine is the reason why Parliament cannot create a law that will conflict with one that may restrict future law making, therefore allowing more freedom with law making and ensuring that no Parliament will be superior to another one. As Parliament is supreme no judge can challenge or amend Parliament law.