Boris Johnson has said there is 'extreme danger to the world' from Russia’s potential invasion of Ukraine, which is a shock that will 'echo around the world'. Speaking at the Munich Security Conference on Saturday, the prime minister said: 'As I speak to you today we do not fully know what President Putin intends, but the omens are grim. And that is why we must stand strong'
Ukrainian president to call for west’s help at Munich conference
Ukraine crisis – live updates