Playing music out loud on buses and trains could be banned under a proposed LibDem rule, even though it is already banned, just rarely enforced.The LibDems plan to submit an amendment to the Bus Services bill which is currently going through Parliament and aims to devolve management of bus services to local authorities. The amendment being proposed would only cover England and could allow authorities to impose fines of up to £1,000 on people who play music out loud on public transport, at