A convicted sex offender took indecent photographs of a girl by using a concealed camera at this year's Lord Mayor's Procession, a court heard on Friday.

A convicted sex offender took indecent photographs of a girl by using a concealed camera at this year's Lord Mayor's Procession, a court heard on Friday.

Trevor Chatters secretly took photos of a 12-year-old girl as thousands of unsuspecting families gathered to enjoy the July parade.

The precise method used by Chatters was not revealed, but Norwich Crown Court heard he had used a “discreet camera system” to take pictures up the girl's skirt.

The 61-year-old, of Coronilla Green, Gorleston, admitted one charge of taking indecent pictures of a child. He has also pleaded guilty to similar charges at Southwark Crown Court as a result of evidence found at his home following the Norwich offence.

The case was adjourned to allow the Crown Prosecution Service to consider further charges.

Prosecutor Malcolm Robins said: “Items found at his home suggest this is not an isolated incident and should not be treated as such.”

Chatters was already known to police following similar offences and, at previous hearings, defence solicitors said he had an addiction, which he had been unable to tackle.

In 2000 he was caught outside Norwich High School for Girls, in Newmarket Road.

A 17-year-old student on a school bus spotted him taking shots of young girl's legs with a video camera hidden in a bag.

When he was caught, he told officers: “I am seeing a psychiatrist about this I can't help myself when the weather is warm like this.”

In 2004 he was in trouble again after being seen taking pictures of adult women from beneath Yarmouth pier.

Chatters will appear in court again on October 19 when he may be sentenced or face further charges.

Judge Peter Jacobs said that as part of any sentence he was likely to ask probation officers to work with Chatters to prevent further serious offending.