Photo from UNIAN

British Prime Minister Theresa May on April 23 spoke to Ukraine's President-elect Volodymyr Zelensky over the phone to discuss the importance of joint efforts to deter Russian aggression.

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"The Prime Minister reiterated support for Ukraine's sovereignty and territorial integrity, and our desire to expand our already significant defence and security cooperation. The Prime Minister stressed the importance of our two countries working together alongside the international community to deter Russian aggression," according to a press release published on the official website of the British Government.

Theresa May also congratulated Zelensky on his success in the presidential elections.

"She assured President-elect Zelensky of the UK's support for his upcoming Presidency and Ukraine's democratic future, and our willingness to continue and increase our already deep partnership across a range of areas," the statement said.

In addition, the British Prime Minister invited Ukraine's future president to visit the UK at the earliest opportunity and they agreed to remain in close touch.