Last modified on Fri 21 May 2021 11.20 EDT Sir Len Blavatnikâs massive increase in wealth during the pandemic â up by £7.2bn to £23bn â has made him Britainâs richest man once more, according to the Sunday Times rich list. He has made recent gains from glamorous businesses such as record label Warner Music and sports streaming provider Dazn. But the original source of the Ukrainian billionaireâs wealth was energy and metals companies formed around the breakup of the Soviet Union. Blavatnik, 63, was born in Odessa, in Soviet Ukraine, emigrating to the US with his family in 1978 after studying in Moscow. In 1986, he founded Access Industries, a privately held industrial group based in the US.