People educated at Watford Grammar School for Boys

British politician, Secretary of State for Defence

British children's author and poet (born 1946)

British conductor (1944–2024)

English classical pianist and renowned accompanist (1899–1987)

British actor and comedian (1927–1994)

British mathematician

British biochemist and theologian (1924–2006)

Welsh businessman

English historian (1915-2001)

British business executive

English Business Leadership, Officer and rugby union footballer

English footballer (1873–1933)

British punk artist

British mathematician and physicist (1942–2000)

British actor, director, producer and writer