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.
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Cloud and outbreaks of rain will ease away eastwards during the morning, clearing the east coast around midday with sunny spells developing.
Police and emergency services are attending the scene.
Rebel-held east remains at risk while the pumping station supplying the western part of the city is once again in operation.