During Her Majesty’s 66 year reign she has never had to sack a prime minister who refused to resign after a vote of no confidence. The Queen has sought advice on the circumstances in which she can dismiss a prime minister, a source has told i. There is no such person as the Prime Minister of England. News Politics Queen 'sought advice' on sacking Prime Minister, source claims The monarch reportedly asked aides for first time in her reign just how and when should could dismiss a PM. Some experts believe that only in the circumstances in which it could be shown by Parliament that an alternative prime minister can muster a majority, the Queen could require Mr Johnson to resign. The last time a British prime minister was dismissed was in 1834, when William IV dismissed Lord Melbourne. (Photo by Victoria Jones – WPA Pool/Getty Images) Failing to step down would risk bringing the Queen into the Brexit dispute, as the monarch appoints PMs and, in theory, can dismiss one who behaves unconstitutionally,” the broadcaster adds. Constitutionally, the Queen can't exercise the executive power required to dismiss the Prime Minister - only the Governor-General can do this. The Prime Minister is the leader of the UK government and Westminster is the parliament for the entire UK, not England. Boris Johnson is the Queen’s 14th prime minister.