A painter, born in Edgbaston, Birmingham, who received no professional art training, Coudrill had a career as a stage designer during the late 1920s. His industrial and brewery signs were displayed at the Royal College of Art in an exhibition prior to World War II. During the 1940s he worked in film and theatre publicity and created children's television puppets.
During the 1950s he moved to St Ives where he ran his own gallery, the Mermaid Arts Centre. He became a regular exhibitor with the Penwith and Newlyn Art Societies. His son is the artist and musician Jonathon COUDRILL.