Ministers are under pressure to explain why a crony of Vladimir Putin was allowed to float his company on the London Stock Exchange after the United States accused him of links to organised crime.
Oleg Deripaska and his firms were hit with American sanctions on Friday in a crackdown on “malign” Russian activity.
The energy tycoon, known in the UK for once hosting Lord Mandelson and George Osborne on his yacht, was accused by the US Treasury of “directly or indirectly” working for the Kremlin, as well as ordering the murder of a business rival and bribing an official.
His US assets have been frozen and Americans are barred from doing business with his various companies, some of which are based...