Born in 1926 Derek Studied at Slade School of Fine art before serving in the army with the Durham Light Infantry.  He was wounded in Tunisia. Returning to civilian life he taught at the Edinburgh College of Art from 1947-1978.  In 1950 he was elcted member of the Royal Society of Portrait Painters; in 1976  a member of the Royal Scottish Society of Painters in Water-colour and 1989  he was elected Associate member of the Royal Scottish Academy.