Dr Rowan Williams has expressed his "deep sorrow" over mistakes made by the Church of England in the Peter Halliday child abuse case, affirming its tough policy and calling for vigilance.

After the jailing of a choirmaster for sexual abuse against children in the 1980s, the Church of England says that the mistake of failing to report an abuser to the police would not happen now. But the case highlights the need for extra vigilance and robust child protection policies.