Two men posed as council officers to try to con an elderly couple out of thousands of pounds.

The incident took place at a house in St Martins Drive, Walton, at about 10am, on Friday, July 15, when a man told the couple he was a building control officer who had come to inspect some recent work.

The couple, in their 80s, were then told they would have to produce a certificate to confirm the building work had been carried out correctly and a colleague of his would be in touch with them about this.

The man left, and at about noon, an accomplice arrived claiming he was also from the council. He demanded the couple pay £4,500 to obtain the certificate.

However, the couple were suspicious and refused to give him any money and he left.

The man who had originally posed as a council officer then phoned the house several times, demanding they pay the money, but again, the couple refused.

Surrey Police, who described the incident as a “new and unusual” method of trying to con people, are now appealing for people to help them identify the two men.

The first man was white, in his mid-30s, 6ft and slim. He had short dark hair, blue eyes, was clean shaven and spoke with a southern accent. He was wearing a blue and white striped jumper, blue jeans and dark trainers.

The second man was white and tanned, between 50 and 60-years-old, about 5ft 5in and of large build. He had shoulder-length brown hair, which was brushed back and also spoke with a southern accent. He was wearing a brown chequered shirt and brown trousers.

Detective Constable Ian Davies, leading the investigation, said: “This was a concerning and clearly planned incident where two cynical offenders have made a concerted effort to con an elderly couple into giving them a substantial sum of money.

“Fraud and distraction offences of this nature are always particularly despicable as the offenders usually target the most vulnerable members of our communities.

“I would like to praise the victims for refusing to hand over any cash, but they are both very frail and this has understandably been a hugely upsetting experience for both of them.

“The persistent harassment and pressure the suspects put the couple under is obviously very worrying.”

Elmbridge Neighbourhood Sergeant Charlotte Chambers said people should be wary, however plausible the story my seem.

She said: “We are advising residents to stay vigilant to the distraction techniques offenders use to try and gain access to people’s homes.

“Neighbours of elderly or vulnerable homeowners can help by making them aware of the potential pitfalls and keeping an eye out for suspicious people around their properties.

“Under no circumstances should you let an unexpected visitor into your home.

“Always stop to think whether you are expecting any callers, use the chain if you do decide to answer the door and check for identification before letting anyone in.”

Suspicious people should contact Surrey Police immediately.

Anyone who witnessed the incident or who recognises the suspects should call Surrey Police on 0845 1252222, quoting reference EL/11/5490, or call Crimestoppers anonymously on 0800 555 111.