Alexander Litvinenko was poisoned on the direct orders of the Kremlin because of his biting mockery of President Putin, according to a former Soviet spy now living in Britain. Oleg Gordievsky, the most senior KGB agent to defect to Britain, said that the attempt to kill Mr Litvinenko had been state-sponsored. It was carried out by a Russian friend and former colleague who had been recruited secretly in prison by the FSB, the successor to the KGB. The Italian who allegedly put poison in Mr Litvinenko’s sushi “had nothing to do with it”. “Of course it is state-sponsored. He...