UK imposes sanctions on Putin's cousin and billionaire Potanin

The sanctions list also includes billionaire Vladimir Potanin, who bought Rosbank and shares in Tinkoff Bank following Russia's full-scale invasion of Ukraine.

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According to the UK Foreign Office, Potanin continues to amass wealth by supporting the Putin regime.

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"As long as Putin continues his abhorrent assault on Ukraine, we will use sanctions to weaken the Russian war machine," a UK government spokesman said.