5 Live Investigates reveals the growing crisis in police high tech crime units responsible for the forensic analysis of mobile phones and computers in cases of child sexual abuse.

Some forces are failing to even allocate new cases for more than six months, others have delays of more than a year. Concerns are growing that children continue to be abused during the delay.

And, chaos in the business rates system has allowed unscrupulous agents to charge companies for bogus advice about how to reduce their bills - at an estimated cost of hundreds of millions of pounds.