The Lib Dems are on to a vote winner with their plan to crack down on yobs who blare out music on public transport. The party wants to change the law to explicitly ban playing music and videos out loud on trains and buses in England. As an almost daily user of London’s public transport network, there is little that enrages me more than those who decide we all need to hear the music they’re listening to, the video they’re watching or the phone conversation they’re having.