After enjoying considerable success in his native country, he relocated to Europe in 1932 and spent most of the rest of his life in France.

He made an immediate impact by winning the 2000 Guineas aboard Colombo but was criticised for his tactics when finishing third on the same colt in the Epsom Derby and returned to France shortly afterwards.

[1] During the Second World War Johnstone was rejected for military service and briefly went back to India, before resuming his riding career in France.

[4] In the immediate post-war period Johnstone had great success riding French-trained horses in major British races.

As far as I can make out, people go to races in America to eat sandwiches and hot dogs and to bet on a number".

[4] He died in Paris on 29 April 1964 after suffering a heart attack at Le Tremblay racecourse.

His second marriage lasted until his death although he also carried on a long-term relationship with a mistress, Margo Winnick.