By Charlie Conchie The UK government must confiscate Russian central bank assets and do “everything in its power” to force the release of imprisoned British-Russian campaigner Vladimir Kara-Murza following the death of Alexei Navalny, one of Putin’s fiercest critics has claimed. Bill Browder, once dubbed the Kremlin’s most wanted man and formerly among Russia’s largest foreign investors, launched a scathing attack on the UK government and called on ministers to take drastic action to punish the Kremlin following the death of Navalny in prison last week. Browder has been a vocal opponent of Put…