British Prime Minister Keir Starmer said the Coalition of the Willing, working with the US, would "go further than ever" to pressure Vladimir Putin by targeting “the battlefield and his war economy”.
He said the UK sanctioned all major Russian oil companies last week and welcomed US and EU measures announced on Wednesday.
Speaking at a meeting of coalition leaders in London on Friday, Ukrainian President Volodymyr Zelenskyy meanwhile called for stronger air defences and said Kyiv must find a way to produce its own systems, noting Europe had delivered Patriot systems under US licences.
This, as NATO Secretary General Mark Rutte said a decision on sending long-range Tomahawk cruise missiles to Ukraine remains under review by US President Donald Trump.
"It's up to the US to decide," he said.
