Three-quarters of England's local safeguarding and child protection boards were not recording information on child sexual exploitation, the report said.

BBC: 'Thousands of children' sexually exploited by gangs

However, there are some concerns from the Dutch data protection authorities about the recording of calls between lawyers and their clients.

BBC: NEWS | UK | UK could ring changes on phone taps

The government's information commissioner's office said the secret recording of a conversation was potentially a breach of the Data Protection Act.

BBC: Norfolk County Council warning over secret recordings