If you type "Mr Royal Enfield" in google, you'll correctly get hits for Kevin Mahoney or Pete Snidal. But in earlier times in the UK the title went to another man.
Jack Gray was one of the founders of Gander and Gray, a parts supplier in the East End of London specializing in Royal Enfield. The shop opened in 1947 and closed in 1989. One of the parts from his shop can be seen on display in the Royal Enfield Bullet Big Head being auctioned on ebay this week.