Sir Keir Starmer has pledged to bolster Ukraine's position significantly during a trip to Kyiv where he signed a substantial 100-year agreement with the war-torn country.
During the Prime Minister's visit on Thursday, there were instances when loud explosions and air raid sirens were heard as Ukraine's defense systems intercepted a Russian drone attack.
Responding to the "greetings" from Russia, Volodymyr Zelensky stated that Ukraine would reciprocate in kind.
The Ukrainian President commended the UK's unwavering support amid concerns that U.S. President-elect Donald Trump might reduce aid.
Zelensky is seeking to solidify security assurances from key allies in light of concerns that the new U.S. administration may push for peace talks with Russia.
The British Prime Minister promised to provide more assistance to Ukraine in its ongoing conflict with Russia, which has been ongoing since February 2022.
Sir Keir expressed long-term commitment by saying, "We are with you not just today, for this year or the next - but for 100 years."
The pact signed on Thursday formalizes the economic and military aid previously pledged by the UK to Ukraine.
In addition to military support, economic aid, and healthcare assistance, the agreement includes enhanced military collaboration on maritime security and drone technology.
The leaders laid wreaths at the St Michael's Golden-Domed Monastery as a sign of respect for the fallen, and Sir Keir visited various sites including a damaged apartment building and a hospital specializing in burn treatment.
Zelensky called the visit "truly historic" and emphasized the strengthening relationship between the two countries.
Prior to his inauguration, Trump, the Ukrainian President, has looked to the UK for support in obtaining security guarantees to deter future attacks.
The latest commitments build upon the substantial support the UK has already provided to Ukraine.
Russian forces have made significant advances in eastern Ukraine, with reports indicating key infrastructure blockades and territorial losses for Ukraine.
The ongoing conflict underscores the severe toll on Ukraine and the need for continued international support.
Plans for the treaty with Ukraine began under the previous government and will be presented to Parliament in the upcoming weeks.
Sir Keir's visit marks a significant milestone in the UK's support for Ukraine, further solidifying the partnership between the two nations.