In the 1960s he had some cameo roles in Coronation Street and Dad's Army.
He became well known for playing the part of Gunner 'Lofty' Sugden in the 1970s British sitcom It Ain't Half Hot Mum. The character was dubbed with the ironic nickname of "Lofty" on account of Don Estelle's small stature. He had a remarkable tenor voice and as a spin-off from the series, Estelle and his co-star, Windsor Davies had a number one hit in the UK with a semi-comic version of Whispering Grass He also acted in the films Not Now Comrade, Private Function (1984) and Santa Claus: The Movie (1984).
In the first series of The League of Gentlemen he made brief appearances in two episodes as Little Don, keeper of the Roundabout Zoo (i.e., a zoo on the island of a roundabout intersection).
Some information taken from his obituary in the Daily Express, August 5, 2003.