The British government is preparing to demand the extradition of a Russian businessman to stand trial for the poisoning with polonium-210 of the former KGB officer Alexander Litvinenko. Senior Whitehall officials have told the Guardian that a Scotland Yard file on the murder which is about to be passed to the Crown Prosecution Service alleges that there is sufficient evidence against Andrei Lugovoi for the CPS to decide whether he should face prosecution. Read More: http://www.guardian.co.uk/frontpage/story/0,,1999204,00.html