Russian President Vladimir Putin "personally ordered" the killing of Alexander Litvinenko, the inquiry into the former spy's death has heard.

Ben Emmerson QC, representing Mr Litvinenko's family, said Russian state responsibility for the killing had been proven "beyond reasonable doubt".

Mr Putin's "personal cabal" are "willing to murder those who stand in their way", Mr Emmerson added.

The Kremlin told the BBC it did not trust the inquiry.

Gordon Corera reports.