Here is the standard Marxist analysis of the London riots, or indeed any kind of riot. The rioters are just victims of capitalist oppression, expressing their frustration against their overlords.
http://weknowwhatsup.blogspot.com/2011/08/riots-in-uk-no-surprise.html?utm_source=feedburner&utm_medium=email&utm_campaign=Feed%3A+FactsForWorkingPeople+%28Facts+For+Working+People%29
Comment -
In brief