British Prime Minister Boris Johnson spoke to Ukrainian President Volodymyr Zelensky on Monday as part of their "ongoing dialogue," and told him that the UK will "strengthen economic pressure" on Russia, a Downing Street spokesperson said.
The prime minister "reiterated the UK would maintain and strengthen economic pressure on Putin’s regime," the spokesperson continued.
In a tweet Monday, Zelensky also said that the two countries "discussed strengthening sanctions against Russia."
The UK has imposed a raft of sanctions on Russia, targeting individuals and companies.
Zelensky also gave Johnson an update on the "appalling humanitarian situation" in the besieged city of Mariupol "where heavy fighting continues," the spokesperson said.
“The Prime Minister offered his full support to Ukraine in the face of Russia’s continued aggression, including with humanitarian support and more defensive equipment," they added.
Finally, as the latest round of talks between Russia and Ukraine are set to kick off in Istanbul on Tuesday, the Ukrainian leader also briefed his British counterpart on the talks, according to Downing Street.