Lotus 49b Graham HillBonhams

A Lotus Formula One car once raced by British driver Graham Hill is to go under the hammer at the Goodwood Festival of Speed in June.

One of only a handful still in existence, the 1968 Lotus 49B is expected to fetch up to £1million at the Bonhams sale, having also been driven by former world champions Jim Clark, Jochen Rindt and Emerson Fittipaldi.

The car is the last Lotus to be sold from the collection of the late British racing driver John Dawson-Damer, who died after he crashed a classic Lotus a the Goodwood Festival of Speed in 2000.

Speaking to the Daily Mail, James Knight, Bonhams group motoring director, said: "By every standard, Colin Chapman's Lotus 49 concept is an absolute landmark in Formula One design.

"It simply raised the bar for every rival manufacturer and its Cosworth-Ford V8 engine went on to win a record 155 world championship Grands Prix.

"This car was Graham Hill's but it was also raced by that wonderful driver Richard Attwood to set the fastest lap at Monaco in 1969.

"And private owner Dave Charlton drove it to become South African national champion."

After being retired from racing, the car was badly damaged before being lovingly restored by Dawson-Damer back to racing fitness.

The Bonhams auction will take place at the Goodwood Festival of Speed at Goodwood House, Chichester, on June 27.