Green was the captain of the RAF team at the Cresta Run,[5] where he used an experimental French toboggan and held the Inter-Services record for a number of years.

On 15 October 1997, 50 years and 1 day after the sound barrier was broken in aerial flight by Chuck Yeager, Green reached 763.035 miles per hour (1,227.986 km/h), the first supersonic record (Mach 1.016).

Since then, Green's most recent challenge was the driving of the JCB Dieselmax car, attempting to take the Diesel Land Speed Record over 300 mph (480 km/h).

In 2006 he was awarded the John Cobb Trophy by the British Racing Drivers' Club for "a success of outstanding character"[11] and an Honorary degree from Staffordshire University in July 2008.

On 14 June 2009 Green gained his first circuit racing experience, whilst raising money for the Bloodhound SSC project, by participating in Round 4 of the Elise Trophy at Snetterton.