At least 22 pupils at a British school for emotionally disturbed girls were abused by Jimmy Savile in the 1970s, a police report has said.

The paedophile DJ abused the children, and also one visitor, at Duncroft Approved School in Staines, Surrey.

He committed 46 offences and had "unrestricted and largely unsupervised" access, said Surrey Police, which has now concluded its investigation into Savile.

The abuse happened during at least 16 visits between 1974 and 1979.

Savile was twice allowed to stay at the school overnight.

The Crown Prosecution Service said in December that no former staff would face charges following an investigation to discover if anyone was complicit in the abuse.