Britain's new Prime Minister, Rishi Sunak, made his first visit to Kyiv on Saturday, pledging to continue the firm support for Ukraine that was a focus of policy under his predecessors.
"Britain knows what it means to fight for freedom," Sunak said on Twitter. "We are with you all the way."
Ukrainian President Volodymyr Zelensky posted a video on Saturday of the two meetings in Kyiv.
"With friends like you by our side, we are confident in our victory. Both of our nations know what it means to stand up for freedom," Zelenskiy tweeted.
Sunak, a former finance minister, took office last month following the shortlived premiership of Liz Truss. She and her predecessor Boris Johnson had both made public support for Ukraine an important part of their agenda, and Sunak has said he will continue this.
The US House of Representatives rejected an effort on Thursday to stop President Donald Trump's air war on Iran and require that any hostilities against Iran be authorized by Congress, backing the Republican president's military campaign.
Foreign ministers from the Gulf Cooperation Council (GCC) and the European Union have strongly condemned the Iranian attacks targeting GCC states, calling them a direct threat to regional and global security.
US President Donald Trump claimed the right to join Iran in deciding its next leader as the war escalated, with US and Israeli jets hitting areas across the country and Gulf cities coming under renewed attack.
British Prime Minister Keir Starmer said on Thursday that four additional Typhoon fighter jets would be sent to Qatar amid the ongoing regional developments, insisting that the UK has the right plan for defence.