Petr Aven, a UK-based billionaire who owns a Surrey mansion, is under UK and EU sanctions
He is a billionaire Russian oligarch who has been closely linked to Vladimir Putin for three decades.
And for years Petr Aven also enjoyed the trappings of London high society, as a trustee and donor of the Royal Academy of Arts, as well as owning three multimillion-pound UK properties, including one in the ultra-wealthy Surrey enclave of Virginia Water.
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