There is "no link whatsoever" between the announcement of a public inquiry into the death of former spy Alexander Litvinenko and the current tensions with Russia over the Ukraine, according to David Cameron's official spokesman.
The probe will begin on July 31st and is planned to be complete by the end of next year, they said, adding that it will hold most of its hearings in public, although it could go into closed session if national security was put at risk.
Under the Inquiries Act, Sir Robert Owen who is leading the investigation will have the power to demand the production of witnesses and papers within UK jurisdiction, including agents and documents from the security and intelligence services.
However, he has no such powers in relation to evidence from Russia.
More top news
An astronaut has set off for NASA's first year-long mission to the International Space Station - leaving his identical twin back on Earth.
Taking money from the rich to give to the poor is a debate as old as Nottingham's mythic son, so why are people still so divided on welfare?
An unsettled weekend of weather is in store as conditions turn wet and windy from the west tonight.