It is thought police will respond after tomorrow's sentencing to the question of why Miah was not investigated earlier. Barnardo's chief executive Anne Marie Carrie said:
"We believe thousands of hidden victims of child sexual exploitation are still being let down by the system.
Cases are dropped because of insufficient evidence or an over reliance of victims to act as witnesses
We need to see drastic changes to make sure the abusers who control such vulnerable children for sex and personal gain do not get away with it."
Out of the 137 police investigations the children's charity knew about involving their "service users", only 24 resulted in convictions.
District crown prosecutor for the North West, Linda Vance, said:
"I would urge anyone who has been a victim of any sexual offence not to suffer in silence but to speak to police so they can investigate.
At the CPS we have specialist rape prosecutors who have expertise in dealing with sexual offences cases and we will work with the police and the courts to ensure that victims are given the best possible support throughout the progress of the case."