When you think of gangs, you might imagine young men proving their loyalty through violence, coercion and bravado. But now the number of girls in gangs is rising, leaving thousands in the hands of male leaders and drug dealers. So, why are gangs recruiting more girls? What are they being forced to do? And what’s being done to stop it? ITV Anglia's Tanya Mercer tells Faye Barker what you need to know...