Big Four (Western Europe)

The UK, the post-brexit EU trio and the rest of the member states
France	Germany
Italy	UK

The Big Four, also known as G4 or EU4, refers to France, Germany, Italy and the United Kingdom. These countries are considered major European powers and they are the Western European countries individually represented as full members of the G7, the G8 and the G20. France, Britain, Italy and Germany have been referred to as the big four of Europe since the Interwar period while the term G4 was used for the first time when French president Nicolas Sarkozy called for a meeting in Paris with Italian Prime Minister Silvio Berlusconi, Prime Minister of the United Kingdom Gordon Brown and Chancellor of Germany Angela Merkel to consider the response to the financial crisis during the Great Recession. The OECD describes them as the "The Four Big European Countries".

The leaders of the four countries usually have a series of joint video conference calls with the US president (see NATO Quint), or with other leaders, on international issues. With Barack Obama they discussed for example the TTIP, the Syrian civil war and the use of chemical weapons during the conflict, the Crimean Crisis and international sanctions against Russia, the post-civil war violence in Libya, the Israeli-Palestinian conflict, the 2014 American intervention in Iraq and the Ebola virus disease. With Russia's President Vladimir Putin, they discussed, for example, the Vienna peace talks for Syria.

...
Wikipedia