British espionage organization comparable to CONTROL but not to be confused with British CONTROL
British Intelligence agents encountered by Maxwell Smart include Mr. Ernst [Episode #13: "Aboard the Orient Express"] and Alex Chain [Episode #54: "The Expendable Agent"].
For one mission Max is himself loaned to British Intelligence to thwart the Egyptian villain Hassim who knows every British agent by sight. In London, Max reports to Sir Hubert, apparently the agency's head [Comic Story #15: "The 4000 Year Old Man Caper"].