what is happening there ?
http://news.yahoo.com/uk-pm-recalls-parliament-rioting-crisis-101453737.html
A wave of violence and looting has raged across London, as authorities struggled to contain the country’s worst unrest since race riots set the capital ablaze in the 1980s.
In London, groups of young people rampaged for a third straight night, setting buildings, vehicles and garbage dumps alight, looting stores and pelting police officers with bottles and fireworks into early Tuesday. The spreading disorder was an unwelcome warning of the possibility of violence during London’s 2012 Summer Olympics, less than a year away.
Can any locals please put more detail on why are these people doing this ?