Hindmarsh was killed aged 30 while test flying Hawker Hurricane I L1652 at Brooklands on 6 September 1938; he is thought to have been overcome by carbon monoxide fumes in the cockpit, and the aeroplane then dived almost vertically into the ground and exploded at the foot of St George's Hill almost opposite the Vickers factory entrance.
Hindmarsh married the multiple record breaking racing driver Violette Cordery on 15 September 1931 at Stoke D'Abernon parish church, and they had two daughters, one of whom married the racing driver Roy Salvadori. Widowed in 1938, Cordery retired from public life until her death on 30 December 1983 in Oxshott, Surrey.
Complete 24 Hours of Le Mans results
|1930||Fox & Nicholl||Tim Rose-Richards||Talbot 90||3.0||160||4th||2nd|
|1931||Fox & Nicholl||Brian Lewis, Baron Essendon||Talbot AV105||3.0||132||DNF|
|1934||A.A. Rigby||Brian Lewis, Baron Essendon||Singer Le Mans 1½ Litre||1.5||195||7th||3rd|
|1935||Arthur W. Fox & Charles Nicholl||Luis Fontés||Lagonda M45R Rapide||5.0||222||1st||1st|
|1937||Arthur W. Fox||Charles Brackenbury||Lagonda LG45||5.0||30||DNF|
- John Hindmarsh at Historic Racing