Later in 1938, the Euston Road artists contributed to the Fifteen paintings of London exhibition held at the Storran Gallery.
Throughout 1937 to 1939 Shephard exhibited with the founding members of the Euston Road School, William Coldstream, Claude Rogers and Victor Pasmore at the Storran Gallery whilst continuing to exhibit with the London Group.
The Storran Gallery was a fashionable avant-garde art gallery in London in the 1930s.
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From 1930 he designed book jackets and bindings for the Oxford University Press, with a break for military service during World War II when he designed camouflage and in 1936 he had an exhibition of paintings at the Storran Gallery.