Gwyther Irwin (7 May 1931 – 18 October 2008) was a British abstract artist born in Hampshire. He studied at Goldsmiths College of Art and the Central College of Art, London, before going onto represent Britain at the Venice Biennale, along with Joe Tilson, Bernard Meadows and Roger Hilton in 1964.
His most famous artworks consist of pictures assembled from newsprint and fragments of advertisements on paper, which he collected from the streets with his wife. These were then worked up into collages of fine delicacy and quite subtle shades, which later also incorporated string, wood shavings, chalk and paint. It was these works for which he became best known and most celebrated, which he called ‘three-dimensional collage’ and described as half way between painting and sculpture. In his later years Gimpel Fils honoured him with a retrospective in 1987 and his works were included in major shows at the Redfern Gallery, Barbican and Tate Britain in the late 1990s.