 Complete the following phrase:  The Big Four, also known as G4, refers to France, Germany, Italy and the United Kingdom. France and the United Kingdom are official nuclear-weapon states and are permanent members of the United Nations Security Council with the power of veto, which enables any one of them to prevent the adoption of any substantive draft Council resolution, regardless of its level of international support. The United Kingdom is the only country of the Big Four which is not a member state of the European Union having ended its membership in 2020 after a 