Oliver Cromwell isn't so hot either but he isn't even mentioned.
Oliver Cromwell was named one of the top TEN Britons. He was a murdering loon.
The BBC is a leftist organization. It named Oswald Mosley the worst Briton of the 20th century. Mosley was a bad guy and a friend of Mussolini, but did he have the same negative effect as, God forbid, Neville Chamberlin?