Litvinenko "decreased dramatically" after poisoning

Alexander Litvinenko's wife has said she didn't believe it possible her husband could die after he was poisoned in 2006.

Marina Litvinenko, who is campaigning for a public inquiry into her husband's death, told Victoria Derbyshire his condition "decreased dramatically" in hospital.

Mr Litvinenko, 43, a former KGB officer, was poisoned with radioactive polonium in London in 2006.

He had been granted asylum in the UK from where he criticised the Russian government.

His family say he was working for MI6 and believe he was killed on Kremlin orders.