British Prime Minister Boris Johnson had a phone conversation with Ukrainian President Volodymyr Zelenskyy to congratulate the latter on the successful push-back of Russian forces from Kyiv.
A Downing Street spokesperson said Johnson "congratulated Ukraine's brave armed forces" for their success in pushing back the Russian army in some areas.
This comes after Ukraine announced that its military had retaken the entire region around the capital.
During the call, Johnson updated Zelenskyy on a recent military donor conference convened by the United Kingdom with 35 countries, stressing "committed to continue to step up defensive support".
On his part, Zelenskyy underlined an update on the steps towards peace negotiations and welcomed "further UK involvement in these diplomatic efforts", according to Downing Street.
Both leaders agreed on the importance of "continuing to ratchet up sanctions to increase the economic pressure" on Russian President Vladimir Putin, as long as Russian troops remained on Ukrainian territory.
The Ukrainian President has described the UK as a "powerful ally", adding: "We look forward to the donors' conference for Ukraine."