Gary Glitter has been arrested by officers working on Operation Yewtree.
- Operation Yewtree is a formal criminal investigation
- It is investigating alleged child sexual exploitation by Jimmy Savile and others
- The operation began as an enquiry but became a criminal investigation after 200 potential victims were identified
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The number of children in care has increased to its highest level for nearly 25 years, the Government's spending watchdog has said.
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