As a rule when musicians enter the public debate they do so at a pretty superficial level. Plan B (real name Ben Drew), spokesman for the $2.869 billion per annum Warner Music Group empire, released this video at the start of the week. Entitled “Ill Manors” it doesnâ€™t take the debate much further than blaming the riots on the David Cameron and Nick Clegg. Read the reports. They are way duller, but more useful.