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He has welcomed Ukraine Leader Volodymyr Zelenskyy.
Britain's Prime Minister says he was 'uncomfortable' watching the White House row between Donald Trump and Volodymyr Zelenskyy.
Keir Starmer's welcomed the Ukrainian leader to Number 10 and spoken to President Trump on the phone, ahead of today's international security summit in London.
Italian Prime Minister Giorgia Meloni has just arrived at Downing Street for these talks.
He's told the BBC he's 'working hard' to bring about peace.