It runs in the family
Not only was her majesty a big horse enthusiast, her daughter, but Princess Anne also took the horse riding game to a whole new level. In 1976, the princess would compete in the Olympics, which at that time were held in Montreal, Canada. To be that good to go all the way to the Olympics where the greatest athletes are collected is a big deal.
Could you imagine if she won gold at the Olympics, that would elevate the royal family to an even higher status of honor and prestige? Well, when you have so many chances to ride horses and all the money in the world for lessons, you better be pretty good by the end of it.