Painter of landscapes, figures and theatre scenes in oils. Born in Epsom, he was educated at Harrow and the Slade School 1896-9, where he formed a friendship with Harold Gilman and where contemporaries included Wyndham Lewis and Albert Rutherston.

In 1902 he went to Madrid with Lewis and studied Goya; in 1904 he painted in Normandy with Rothenstein, visiting Sickert in Dieppe. Through this meeting and Gore’s description of the vitality of contemporary English art, Sickert decided to return to London. In 1905 Sickert lent Gore his house at Neuville and Gore visited the Gauguin exhibition in Paris.

A friend of Lucien Pissarro, he was a founder member of the Fitzroy Street group, of the AAA in 1908, the Camden Town Group in 1911 (of which he was the first President), and of the London Group in 1913. He also exhibited at the NEAC, becoming a member in 1909. In 1912 his work was included in the second Post-Impressionist Exhibition and he was chief organiser and an exhibitor in the English Post-Impressionists, Cubists and Others exhibition, Brighton.

In 1913 he exhibited with Gilman at the Carfax Gallery where he continued to exhibit. He also showed in Paris and in 1912 organised the Cave of the Golden Calf decorations. He described himself as a Neo-Impressionist and he was one of the most innovative and widely liked amongst his contemporaries.

His early interests were in Goya, Whistler, and in theatrical subjects. His close contact with Sickert in 1906 is reflected both in subject and style and by 1907 he had also absorbed much from Lucien and Camille Pissarro, using broken brushstrokes, colour analysis and, in some works, a pointilliste technique.

Under the impact of the Post-Impressionist exhibitions and the work of Gauguin and Matisse, his own work began to use larger areas of colour painted in flatter patterns and in his later work at Letchworth and Richmond he evolved a personal, innovative style of formal shapes and bright colour.