Shaun Bailey: Youth Worker & Peter Power: former senior officer at Scotland Yard

Cities burning, shops looted, police seemingly overwhelmed - London and a host of other English cities have seen the worst outbreak of street violence in a generation, but what prompted these summer riots? How will Prime Minister David Cameron deliver his promised fight back against what he calls 'sick elements' in British scoiety? Stephen Sackur is joined by a community youth worker turned Conservative politician, and a former senior policeman. How deep is this English malaise?