This article is remarkable and I highly recommend reading it. Three notable paragraphs from it are very telling:

Sheffield crown court heard that Birley, a painter and decorator from Swinton, was involved in many of the worst incidents on that Sunday afternoon, including adding wood to a fire in a large industrial bin that had been pushed against an exit, and helping to place another bin on top of the one ablaze.

Birley was also filmed throwing missiles at police, squaring up to officers while brandishing a police baton and throwing a large bin that crashed into a line of police with riot shields.

He is the first person to be sentenced for arson with intent to endanger life after the 12 hours of violence in Manvers that left 64 police officers, three horses and a dog injured.