Police say Manchester rioters copied London violence
The August riots probably would not have spread to Manchester if police in London had acted faster, the city's chief constable has told BBC Panorama.
Peter Fahy said, with the benefit of hindsight "if London had been under control sooner, we probably would not have faced the problems in Manchester".
He added that his force is still tracking down hundreds of suspects from at least 300 crime scenes.
When the riots hit London, Manchester sent 100 public order officers to help.
Jeremy Vine reports.