Alexei Navalny was a starch opponent of Russian President Vladimir Putin, orchestrating some of the biggest anti-Kremlin protests in the country before his death in a Siberian prison at the age of 47,

A leaked report into Alexei Navalny’s death provides ‘compelling evidence’ that he was poisoned, according to the author of a best-selling book about the opposition leader. John Sweeney said a Russian detective had recorded how Vladimir Putin’s fiercest critic vomited and went into convulsions shortly before his death a year ago today.

The EU on Sunday said that Russia's President Vladimir Putin bore "ultimate responsibility" for the death of Alexei Navalny, as it paid tribute to the late opposition figurehead on the one-year anniversary of his passing.