Reg Gammon was born in Petersfield, Hampshire, on 9 January 1894 and was educated at Churcher’s College.
From 1911 he was apprenticed to the illustrator Frank Patterson. He declined a 1918 offer of a place at the Slade School of Fine Art, but nonetheless had a successful career as a freelance illustrator and writer. For 60 years he wrote and illustrated a feature column for the Cyclists Touring Club’s Gazette. The dropping of another column, “In the Open Air”, for Scout magazine, resulted in international protests and it was restored.
In 1930 he began to produce work for the News Chronicle. Travelling by motorcycle, he would attend horseracing at Goodwood or motor racing at Brooklands, make sketches, and ride quickly back to London to deliver them. He also covered the Monte Carlo Rally.
During World War II he moved his family to South Wales, and became a hill farmer, managing 40 acres (16 ha) in the Llanthony valley near Abergavenny. He stayed there for 20 years, and was instrumental in the introduction of electricity supply and telephone services to Llanthony. He moved to Somerset in 1958 and became a full-time painter.
He originally painted in watercolour, but on holiday in his 60s, he began to use oil paint. His work was influenced by Paul Gauguin and he later worked in the expressionist style. He was elected to the Royal West of England Academy (RWA) in 1966 and they held a retrospective of his work in 1985, and in 1986 he held the first of five one-man exhibitions at the New Grafton Gallery in London. A further retrospective was held at the RWA to mark his 100th birthday.
He was also a member of the Royal Watercolour Society and the Royal Institute of Oil Painters.
Gammon died at Bridgwater, Somerset on 22 April 1997, aged 103.