The long-awaited findings of a public inquiry into the killing of former Russian spy Alexander Litvinenko are due to be released by a judge.
Mr Litvinenko died aged 43 in London in 2006, days after being poisoned with radioactive polonium-210, which he is believed to have drunk in a cup of tea. Two Russian men, Andrei Lugovoi and Dmitry Kovtun, have denied killing him.
The judge will decide whether to name any culprits and whether any elements in the Russian state were responsible. BBC security correspondent Gordon Corera says the real issue for the report is whether the trail leads to the heart of the Russian state and even to President Vladimir Putin himself.
The Kremlin will today be blamed for the murder of spy Alexander Litvinenko but Britain will not punish Russia for fear of damaging relations amid attempts to end the Syrian conflict. A public inquiry is set to conclude that suspects Andrey Lugovoy and Dmitry Kovtun killed the former KGB agent with a radioactive poison in London almost a decade ago and they were acting on orders of the Russian state. However, the U.K. will not impose any economic sanctions on President Vladimir Putin’s regime, the Telegraph understands, despite the Kremlin already dismissing the inquiry findings before they have been published. Senior Foreign Office diplomats have lobbied David Cameron, the Prime Minister, not to take further action because Anglo-Russian relations are vital in the fight against Islamic State in Iraq and Levant (Isil) and the removal of Syrian president Bashar al Assad.