Windsor Davies (28 August 1930 – 17 January 2019) was a British actor. He is best remembered for playing Battery Sergeant Major Williams in the sitcom It Ain't Half Hot Mum (1974–1981) over its entire run. The show's popularity resulted in Davies and his co-star Don Estelle achieving a UK number one hit with a version of "Whispering Grass" in 1975. He later starred with Donald Sinden in Never the Twain (1981–1991), and his deep Welsh-accented voice was heard extensively in advertising voice-overs.