British Prime Minister Keir Starmer pledged on Thursday to work with Ukraine and allies to offer Kyiv robust security guarantees if a ceasefire is negotiated with Russia, offering more support to President Volodymyr Zelenskiy with a 100-year partnership deal.

The deal aims "to deepen security ties and strengthen partnership for future generations."

British Prime Minister Keir Starmer said the landmark century-long agreement commits the two sides to cooperate on defense — especially maritime security, and on technology projects including drones.

British Prime Minister Keir Starmer visited Ukraine to strengthen ties and pledge additional military aid to the war-torn country. View on euronews

British Prime Minister Keir Starmer said the drone threat was "a reminder of what Ukraine is facing every day."

Arriving on Thursday morning, he accompanied Ukrainian President Volodymyr Zelensky to lay flowers at a wall of remembrance for those killed in the war with Russia - telling reporters the UK will "never let up" on giving the necessary support to Ukraine.

The prime minister was speaking to Sky News's political editor Beth Rigby while on a surprise visit to Ukraine on Thursday.

British Prime Minister Keir Starmer concluded a "landmark 100-year" security and economic partnership with Ukrainian President Volodymyr Zelensky on his first visit to the country since becoming U.K.

Keir Starmer will meet President Volodymyr Zelensky for talks on strengthening the bond between the UK and Ukraine in the face of Russia’s brutal onslaught

Sir Keir Starmer has vowed to put Ukraine in the "strongest possible position" this year during his first trip to Kyiv as Prime Minister. The Labour leader’s visit to the presidential palace in the capital coincided with a drone attack by Vladimir Putin ’s forces on the city.

British Prime Minister Keir Starmer, during his first visit to Ukraine as prime minister, reaffirmed Britain's support to ensure Ukraine's strong position against Russia by 2025. He announced a 100-year partnership to deepen security and cultural ties while providing significant financial and military assistance to aid Ukraine's economic recovery and bolster its defense capabilities.