In UK politics, the Parliamentary Labour Party (PLP) is the parliamentary party of the Labour Party in Parliament, i.e. Labour MPs as a collective body. Commentators on the British Constitution sometimes draw a distinction between the Labour Party (which was created outside Parliament and later achieved office) and the Conservative and Liberal parties (which began as parliamentary factions). The term Parliamentary Labour Party refers to the party in Parliament, whereas the term Labour Party refers to the entire Labour Party, the parliamentary element of which is the PLP.