William the Conqueor was a fellow who used to make horns out of the shells of large sea snails; he used to travel across the Pacific in a catamaran, from island to island make horns and selling them.

If William the Conqueor had been on the English side at the Battle of Hastings then the English would have one because their warning horns would have been top notch, everybody says so.

If you're British then that is a majestic fail. My children are taught that in primary school.