He is most famous for being responsible for rescuing a team of French nuclear scientists and transporting the entire world stockpile of heavy water from France to Britain in the face of the imminent French defeat in 1940. He was known by the nicknames Mad Jack, Wild Jack or just Jack and although he was generally referred to in aristocratic circles as Suffolk, he was better known in the workaday world as Jack Howard (more officially Charles Howard).
He is most recognized for rescuing a team of French nuclear scientists and transporting the world's heavy water stockpile from France to Britain during World War II. He was known by various nicknames like Mad Jack, Wild Jack, or just Jack, but in more common circles he was known as Suffolk, although his true name was Charles Howard.