The UK PM says there is a "viable chance" of a ceasefire between Russia and Ukraine ahead of Friday's US-Russia summit in Alaska.

Zelensky’s trip to the British capital comes a day after he took part in virtual meetings from Berlin with President Trump and the leaders of several European countries.

President Donald Trump has often bragged about his warm relationship with Russia’s Vladimir Putin. But in the months leading up to the leaders’ first meeting in six years, Trump began asking Europeans and White House aides what’s changed about his counterpart.