It was after receiving burns in the crash in Caen (where he leapt from the car at 90 mph) that he pioneered the marketing of flameproof overalls. At the time many racing drivers wore short sleeved shirts - Leston's fame and connection to all the great Formula One drivers meant that very soon a lot of them were wearing Les Leston overalls. Graham Hill appeared regularly in Leston's adverts in such overalls, also sporting the Leston made Graham Hill rally master jacket.