A man who built up a huge buy-to-let empire through a £300m mortgage fraud has been jailed, along with others including a chartered surveyor who overvalued the properties.

The fraudsters were brought to justice after an investigation by Northumbria Police working closely with the RICS.

David Purdie, 57, ran North East Property Buyers, and Newcastle Home Loans, operating a sale and rent-back scam.

Properties were bought cheaply, often from distressed sellers who were told they could continue to live in them as tenants.

Mortgage applications were falsified on some 2,400 properties, with purchase prices and potential rental income overstated.

The mortgages were put in the names of Purdie and his co-defendants, but also unsuspecting family, friends and associates.

The scam collapsed after one of the lenders noticed irregularities in some of the paperwork and alerted the Financial Services Authority.

The homes were then repossessed, leaving hundreds of tenants including pensioners homeless.

Southern Pacific Mortgages, the Chelsea Building Society, and Mortgage Express lost more than £110m.

Losers also included the innocent people named on the mortgage applications. The court heard that some were left in financial ruin.

Purdie, 55, who lived in a mansion in Gateshead, was jailed for five and a half years.

Michael Foster, 43, a partner at North East Property Buyers and director of Newcastle Home Loans, was jailed for three years and nine months.

Linda Patterson, 57, a mortgage underwriter and subsequently a director of Newcastle Home Loans, received a sentence of three years and two months. She had authorised many of the fraudulent mortgage applications.

Chartered surveyor Stephen Keay, 54, of Sunderland, was jailed for 23 months.

Jane Bewsey QC, prosecuting, told Teeside Crown Court that the scale of the fraud was “truly massive”.

She said: “NEPB would source properties from individuals, many of whom were in financial distress, on the basis that they would receive a sum of money sufficient to pay off existing mortgage commitments but falling short of the full market value of their property.

“They would be told that they would be able to continue to live in the property as tenants.

“The terms of the agreement varied from case to case.

“Some, indeed many, distressed sellers were led to believe that they could stay in their homes on tenancy agreements, which proved to have no proper legal foundation.”

North East Property Buyers insisted, as part of the sale and rent-back deal, that the sellers used Hall & Co Solicitors to act for them in the sales of their homes to NEPB.

Hall & Co closed in 2011 and the sellers’ solicitor, Peter Maine, who failed to warn them of the risks, died of stab wounds while out jogging in 2013.

An inquest in January this year was told that two days before his death, Maine had heard that he was to be charged with conspiracy to defraud.

The coroner recorded an open verdict, saying he could not be certain if Maine had been murdered or stabbed himself.

The sale and rent-back sector was closed down by the then Financial Services Authority in 2012.