Overview: Some 16,000 officers are policing London's streets after three days of violence, with rioters warned they will feel the "full force of the law". Tonight Liz Mackean we'll be asking who the kids are that are perpetrating the trouble, and try find out what their motives are. Then Iranian rapper Reveal co-founder of hip-hop group Poisonous Poets, Lyn Costello from Mothers Against Murder and Aggression, and media exec Kelvin Mackenzie, will join us to debate what we should do with the rioters. Iain Watson will be examining if a malaise in the police force and a lack of leadership have contributed to the unrest. And David Grossman will be considering if the Prime Minister - who returned to Britain this morning after cutting his summer break short - has completely misjudged the situation.