Stirling presented a surprise birthday gift to Lady Moss last night at the Royal Automobile Club, in the form of an Aston Martin Cygnet.

One of the closest teams in motorsport for many years, Stirling and Lady Moss held a private celebratory dinner on the eve of her birthday at the RAC before they departed for the Ennstal Classic in Austria. When they arrived they were met with the new Aston Martin Cygnet on display in the central rotunda, complete with Stirling’s personal registration – the culmination of six months planning and secret correspondence between Sir Stirling and Aston Martin.

Stirling said: “My greatest partner in everything that I do, Susie is an amazing person and frankly the best wife a man could have. Since seeing a pre-production Cygnet in January I knew that it was the perfect car for Susie; a proper little piece of British luxury and perfect for our life in town.”

Hand-crafted at Aston Martin’s headquarters in Gaydon, taking 150 hours to complete, the Aston Martin Cygnet shares much in terms of design and craftsmanship with the company’s sports cars. Launched in May 2011 with first customer orders arriving at European dealers now, the baby-Aston Martin is based on the Toyota iQ, however like every Aston Martin it can be personalised to suit individual taste and style.

Specifications for Lady Moss’s car include Stirling’s choice of colour, Racing Green, harking back to the company’s sports cars that Stirling raced in the 1950’s and 60’s. The interior features Obsidian Black leather with a contrasting coarse Silver stitch.

Stirling’s own driving career with Aston Martin saw him drive a number of the company’s racing cars including the DB3S, the DBR1 and the DB4GT. This culminated in being part of the factory team that in 1959 secured the company the World Sportscar Championship following victories by the team in the DBR1 at Le Mans and individual wins for Stirling at the RAC Tourist Trophy at Goodwood and the Nürburgring 1000kms.

The Cygnet was supplied through HWM Aston Martin based in Walton-on-Thames, the longest serving of Aston Martin's global network of 134 dealers.

HWM Aston Martin was started 60 years ago by fellow Aston Martin works driver George Abecassis who gave Stirling his first Grand Prix drives in 1951/52 in HWM-built cars, including his first Formula 1 drive at Bremgarten in 1951.