Mourners have gathered to pay tribute to murdered Russian opposition leader, Boris Nemtsov for the final time.<br /><br /> His body is lying in state at Moscow’s Andrei Sakharov rights centre, where a public service will be held, before he is buried in Troyekurovskoye Cemetery, in the south west of the capital, on Tuesday afternoon (March 3).<br /><br /> British former Prime Minister John Major is in Moscow to pay his respects.<br /><br /> Former British PM John Major pays his respects to Boris #Nemtsov in #moscow pic.twitter.com/xAuNrIFGII— Emma Wells (@Emmawells1) March 3, 2015<br /> <br /><br /> Fifty-five-year-old Nemtsov was gunned down outside the Kremlin in a drive-by shooting on Friday (February 27).<br /><br /> His death has provoked both national and international condemnation, leading President Vladimir Putin to personally commission an investigation into the shooting, despite Nemtsov’s continued and prolific criticism of the leader.<br /><br /> Police have yet to trace the murderer, murder weapon or the car that was seen speeding away f
