Walden's reason to leave the band was his heavy drug abuse. In April 2006 Babyshambles went on tour without Walden who was accused of assaulting his girlfriend, arrested and spent nine days in Pentonville prison. All charges against Walden were eventually dropped. He left London in order to get clean of drugs and Mick Whitnall became Babyshambles' new guitarist. Walden was supposed to have played with Babyshambles on their November–December 2007 Arena tour. The band released a statement saying that he had dropped out at the last minute, even after travelling with them on the tour bus. Walden later stated that he did not appear on stage because there were drugs about, even though it was supposed to be a drug-free tour. Furthermore, Walden stated that his successor, Mick Whitnall, did not want him to play with the band anymore.