A pervert admitted secretly filming a woman in a swimming pool changing room.

George Seaton was caught spying on unsuspected visitors at The Aspire National Training Centre in Wood Lane, Stanmore, the sports centre run by spinal injury charity Aspire.

He was charged with voyeurism on February 2 after concerned staff alerted the police when users of the centre - whose 25m pool is open to the public - noticed his unusual behaviour.

Seaton, 41, of Potters Bar, Hertfordshire, admitted a single charge of voyeurism on Friday at Hendon Magistrates’ Court.

The case was adjourned for pre-sentence reports and Seaton was bailed until sentencing on March 14.

Brian Carlin, chief executive of Aspire, said: “Leisure centres can be vulnerable to a tiny minority of people who will take advantage of communal changing areas.

“We have clear signage that bans the use of mobile phones in changing areas.

“Anyone seen using electronic equipment or acting suspiciously in any way will be removed from the centre.

“Our staff are trained to be vigilant, as was demonstrated.”

A member of staff at the centre told the Observer that this was not the first instance of reports that the changing rooms are not properly monitored in order to ensure the safety of swimmers.

The whistleblower, who asked to remain anonymous, said: “They have got mixed changing rooms with everyone using the same space and we have no lifeguard to see if there are people taking photos, especially of young girls.

“They should have someone from security in the changing room.

“There have been a lot of people reporting incidents for a long time.

“A lot of people have complained and they do not do anything.

“They do not want to do anything about it because they do not want people to know there is a problem."

Aspire maintained it is satisfied with its staffing levels and said the changing rooms are “regularly checked by lifeguards and pool attendants”.

A spokesman for the charity said: “It is very difficult for any facility to counter one individual’s aberrant behaviour although we endeavour at all times to look after the safety of all centre users.”