A Purley man has been charged today with a string of child sex offences by police investigating allegations paedophile teachers abused pupils at one of the country's top public schools.

David Sansom-Mallett, 68, of St James Road, is accused of seven counts of indecently assaulting a boy aged under 16 and three of indecently assaulting a boy under 14 between October 1974 and November 1983.

The charges, which relate to three alleged victims, were brought by detectives involved in Operation Winthorpe, a probe into claims of sexual abuse at St Paul's School in Barnes, west London.

Mr Sansom-Mallet, who has been bailed to appear at Westminster Magistrates' Court on February 10, is the second man charged in relation to the investigation and one of seven people who have been arrested.

Former teacher Anthony Fuggle, 57, of Sandy Lane, Sutton, is due to stand trial on May 5 at Kingston Crown Court charged with three counts of making indecent images of children. He pleaded not guilty to all charges on September 17.

The Metropolitan Police's paedophile unit began investigating St Paul's, which was established in 1509 and counts chancellor George Osborne among its alumni, after pupils who attended between the 1960s and 1980s came forward with allegations.

Detectives arrested Mr Fuggle in September 2013 and Mr Sansom-Mallett in June last year.

Last year they also arrested four men, aged 61, 65, 68 and 69, and a 52-year-old woman on suspicion of sexually assaulting a child, as well as a 56-year-old man on suspicion of a historic sexual offence. All have been bailed until dates in February or March.