The deputy head of Princess Diana’s old school was punished today for having naked snaps of a girl on his mobile.

Pervy sir William Whillock admitted possessing 14 indecent images of the pupil and got a three-year community order.

A judge told him he’d committed "a very grave breach of trust" in swapping intimate texts with the teen, who cannot be named.

The 57-year-old was arrested in front of staff and pupils at The New School in West Heath, near Sevenoaks, in January.

Since then Whillock, of Headcorn Road, Staplehurst, has been suspended from his role.

Maidstone Crown Court heard how staff at the school, which now educates children with emotional and behavioural problems, were alerted after the girl accidentally left her mobile phone behind.

A teacher looked at it as she had noticed before that the teenager had written "I love Bill" on one of her school folders.

On the phone she found a number of sexual photographs of the girl, and saw they had been sent to Whillock, a co-founder of the school and also its designated child protection officer.

The teacher also saw text messages sent between the pair when Whillock called the girl "princess" or "gorgeous" and encouraged her to send more pictures of herself.

Prosecutor Andrew Collings said the matter was immediately referred to police and Whillock was arrested on January 14.

His computer and two mobile phones were seized and examined, but the indecent photographs were only found on the phone that he had been using at the time.

The court was told the images were graded at level one on a scale of one to five, with level five being the most serious.

Formerly known as West Heath, the school was attended Princess Diana but closed in 1997 - the day after Diana and Dodi Fayed were killed in a car crash.

It reopened in 1998, as a pupil referral unit, after a donation from Mohamed Al Fayed, and is said to be a "living memorial" to Diana and Dodi.

According to its website, The New School has only one aim, "to rebuild young damaged lives through education".