Meanwhile, an events firm which offers people the chance to experience what it's like to take part in a riot has been accused of encouraging street violence.
People can also take on the role of police officers, in full body armour. One MP has described it as "completely wrong" and "unacceptable", especially in light of last year's disorder in Birmingham. Lee Comley reports.
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Dry overnight, rain by tomorrow afternoon.
Dry with clear spells overnight, cool in rural areas.
"She tried to take hold of the knife to stop him. He told her not to shout out and scream and get on her knees and beg."