Almost five months on since Russia's most prominent Almost opposition leader was poisoned, it appears that efforts by the Kremlin to paint Mr Navally as a western puppet may have been successful.

Through forensic analysis of phone records and travel logs, a team of investigative journalists led by Bellingcat and its Russian partner, the Insider, have identified the names of the eight FSB operatives they believe to be behind the poisoning.

A video recorded by Mr Navalny shows a lengthy telephone call with one of them, Konstantin Kudryavtsev, who revealed that the poison had been administered to the groin area of Mr Navalny's underpants.

Sky News' Diana Magnay has the story.

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