By Olena Harmash KYIV (Reuters) -British Prime Minister Keir Starmer said on Thursday he would give Ukraine the support it needed to put it in the strongest position to fight Russia in 2025, saying before talks in Kyiv with President Volodymyr Zelenskiy: "We mustn't let up".

Sir Keir Starmer has promised to put Ukraine in the “strongest possible position” in 2025 as he visited Kyiv for the first time since becoming Prime Minister. The premier arrived in the country early this morning for talks with Volodymyr Zelensky and to unveil a new 100 Year Partnership between Britain and Ukraine.

British Prime Minister Keir Starmer will meet with President Volodymyr Zelenskiy in Ukraine to sign a new 100-year partnership to deepen security ties, the prime minister's office said in a statement on Thursday.

Vladimir Putin's invasion of Ukraine has been a "monumental strategic failure", Sir Keir Starmer said as he travelled to the country to sign a new long-term partnership deal with Volodymyr Zelensky. The Prime Minister was greeted at Kyiv railway station by the UK's ambassador to Ukraine Martin Harris and Ukraine's envoy to London,

The Prime Minister of the United Kingdom, Keir Starmer, visited Kyiv to discuss security issues with President Zelensky and sign a "100-Year Partnership" treaty. The visit aims to strengthen relations between the countries.

Sir Keir Starmer’s visit to Ukraine comes ahead of Donald Trump’s inauguration and a potential push for a peace deal to end the war with Russia.