An inquiry is to release its report into the death of former KGB spy Alexander Litvinenko, who was poisoned with Polonium-210 while drinking tea at a London hotel.
The report will be made public at 10am, and comes almost 10 years after what was effectively a small nuclear attack on the streets of the UK in 2006.
It has already been with the Home Office for 48 hours, and government sources have briefed various newspapers that the Kremlin will be blamed to some extent.
The Russian president Vladimir Putin is also expected to be named in the report, though it is unclear precisely in what capacity.
The conclusion that agents of the Russian state were responsible for the dissident’s death comes at a time when the UK is working with Moscow to deal with Isis in Syria and amid tensions over Russian troops in Ukraine.
On Wednesday, Defence Secretary Michael Fallon said that the UK was going to send more military personnel to Nato countries in eastern Europe because of the potential threat posed by “Russian aggression”.
