My brothers a copper and he tells me that under a new law, Section 59 i think he said, that if you are driving in an inconsiderate manner, i.e loud exhaust, loud stereo, driving like a wanker, etc in a residential area then you can be warned. After the first warning they have the power to seize your vehicle. He says its extreme but they have done it in Brighton where he lives as it is adhered to in built up areas. He says that on your first warning though that they have to explain the warning correctly for it to be valid. If the copper just says " i hope you`ll have that sorted next time i come across you" then he can`t do jack next time he does. He thinks it may come under another section where you can get a fixed penalty but he says he`s not sure.