Sporadic violence has broken out in several parts of London as shops are looted and police are attacked in a third day of civil disorder - and there has also been unrest in Birmingham. <br /><br />The latest disturbances in the capital were centred around Hackney in east London, and Lewisham, Peckham and Croydon in the south.<br /><br />Clapham also fell victim to rioting, with rows of shops on Lavender Hill attacked.<br /><br />Prime Minister David Cameron is to return to London overnight in the wake of the unrest and will chair a meeting of the Government's emergency committee Cobra on Tuesday.<br /><br />And Britain's most senior police officer has called on parents to contact their children as he urged the public to clear London's streets.<br /><br />Acting Scotland Yard Commissioner Tim Godwin criticised another wave of "gratuitous" violence as he appealed directly to families to help officers bring the situation under control.<br /><br />http://news.sky.com/home/uk-news/article/16045926<br />http://news.sky.com/