Grant took up painting due to the encouragement of the French painter Simon Bussy, going against his family’s wishes for him to have an army career. He trained at the Westminster school of Art in 1902 followed by training at La Palette in Paris from 1906-1907. He was a central figure of the Bloomsbury group and became a member of the Camden Town Group in 1911. Grant was influenced by the work of the Fauves and Cezanne which he saw in the first Post-Impressionist Exhibition held in 1910-1911.