In 1910 Ginner went to London, to serve on the Hanging Committee of the Allied Artists Association's third exhibition. Harold Gilman and Spencer Gore became his friends and persuaded him to settle in London. He lived at first in Battersea, but afterwards in Camden Town, where he was a neighbour of Gilman and Gore and regularly attended the Saturday afternoons at 19 Fitzroy Street, meeting Robert Bevan, John Nash, Albert Rothenstein, Christopher R. W. Nevinson, Jacob Epstein, Walter Bayes, Walter Sickert and Lucien Pissarro. In 1911, he became a member of the Camden Town Group; in 1913 of the London Group; in 1914 of the Cumberland Market Group. In 1914 in the "New Age" he spelt out the artistic creed known as New Realism. In the same year he showed jointly with Gilman at the Goupil Gallery.