Berezovsky , located in London , often criticized Putin .
By mid-2000s ( decade ) , the relations between Russia and the United Kingdom deteriorated when the United Kingdom granted political asylum to Putin 's former patron , oligarch Boris Berezovsky , in 2003 .
oligarch , located in London , often criticized Putin .
By mid-2000s ( decade ) , the relations between Russia and the United Kingdom deteriorated when the United Kingdom granted political asylum to Putin 's former patron , oligarch Boris Berezovsky , in 2003 .