A special constable who indecently assaulted a schoolgirl and was found with over 1,500 images of children is to be sentenced next month.

Kevin McLean, who was based at Heathrow Airport admitted assaulting a girl under the age of 16 on four occasions between January 2001 and 2003 and now faces jail.

Among the offences, he confessed to fondling a girl at Hillingdon Civic Centre, in Uxbridge, and was also pleaded guilty of misusing the Metropolitan Police's computer system.

McLean used the Met's 'CRIMINT' computer system to get hold of confidential information, between January 2005 and August 2007.

The 29-year-old hoarded up to 1,500 indecent images of children, some showing young girls he befriended in erotic poses.

Now a bus driver for National Express, McLean is living with his mother and is awaiting sentence.

He was charged after an investigation by the Metropolitan Police's Directorate of Professional Standards Anti-Corruption Team and suspended from his role as a special constable.

McLean admitted one count of misconduct in a public office by using the Met's intelligence database to access information for 'improper use,' 10 counts of making indecent photographs of children and four counts of indecent assault.

Judge Geoffrey Rivlin QC adjourned the sentence at Southwark Crown Court until April 27 while McLean is assessed by a psychiatrist.