Ukrainian President Volodymyr Zelensky has arrived in London for crucial talks with Britain’s leader Keir Starmer, one day after his extraordinary public argument with US President Donald Trump over Russia’s war and peace talks.

Zelensky was warmly greeted by Starmer outside Downing Street on Saturday afternoon, a few hours after arriving in the country.

The pair will talk before Europe’s leaders descend on London Sunday for a full summit, where they will hope to revive the prospects of a fair ceasefire deal, shore up military support for Kyiv and pave a path forward if the US ends its assistance to the country.

Meeting with king: Britain’s King Charles III and Zelensky are also expected to meet Sunday, according to Britain’s PA Media news agency.

CNN has reached out to Downing Street and Buckingham Palace.

Starmer met with Trump earlier this week in Washington. The UK leader presented the US president with an “unprecedented” state visit invitation from King Charles. Trump described the king as a “beautiful man.”