Used car website Motors.co.uk has signed an exclusive contract to become a sole supplier of used cars for sale on AM sister-brand Parker’s.

Launched on Tuesday after 18 months of negotiation, the deal will see the number of cars for sale on parkers.co.uk almost triple from 35,000 to more than 100,000, all CAP-coded and with free history checks.

The partnership will bring the Motors brand in front of the 1.2 million unique users on parkers.co.uk and a combined audience totalling 3.3 million.

Ed Kenyon, Parker’s managing director, said: “Combining the strength of the motors.co.uk and Parker’s brands, we can offer consumers a great choice of cars for sale alongside our trusted reviews, advice and information.

“Parker’s will also continue to drive the news agenda for motorists, offering the unique, trusted Parker’s perspective on any motoring related issue.”

He said Motors’ dealer customers – numbering around 3,500 – will have the opportunity to reach a targeted car buying audience, most of whom are in the three-month research and buying process.

“For Parker’s dealers the benefit will be favourable rates for becoming part of the Motors’ network,” Kenyon said.

“And for those new to both brands, we will offer value for money and a more cost-effective route to market than our competitors.”

All stock on parkers.co.uk complies with the national Vehicle Safe Trading Advisory Group (VSTAG) security standard.

Motors business development director Adrian Black said: “Both Parker’s and motors.co.uk share the same values in championing the rights of consumers and delivering an excellent service to customers.”

He said parkers.co.uk will consistently offer 80% of Motors’ stock.

Since launch motors.co.uk has become the UK’s third largest motoring advertising network, supplying used cars online to The Daily Mail, Desperate Seller, The Independent and The Sun.