Keeping Children Safe: Information disclosure about child sexual offenders / Department for Children, Schools and Families; Home Office, 15 September 2008
http://www.everychildmatters.gov.uk/_files/Keeping%20Children%20Safe.pdf
"This document describes a pilot scheme in which parents, carers or guardians of children and young people can ask the police to tell them if a person has a record for child sexual offences. If police checks show that they have a record for child sexual offences or other offences that might put the child at risk, the police will consider sharing this information with the child’s parent, carer or guardian."