Born in Newnham-on-Severn, Gloucestershire, Heyworth studied at the Ecole des Beaux Arts in Paris under Benjamin Constant , and later in St Ives under Julius OLSSON and the Australian David DAVIES.

He was living in London in 1900, as this was the address he gave when he signed-into the St Ives Arts Club, although his work had been referred to on the 1899 Show Day.

He returned to Cornwall briefly in 1909 when he lived in Woodlane, Falmouth, but by 1912 he was living in Teignmouth, Devon and by 1917 in Kings Road, London. From 1923 he was in Charlton Kings, Cheltenham, and was good friends with D W Herdman, curator of the Cheltenham Art Gallery.

He may, therefore, have helped with the organisation of the St Ives Artists' Cheltenham Exhibition of 1925 (and he also contributed six works for that show). Although he was accepted as a member of STISA in 1929, his contributions were sparse, and he did not feature in their 1936 Cheltenham Touring Show.