As London rezident Gorsky took over managing eighteen agents, including the Cambridge Five, and the initial Soviet penetration of the British atomic bomb project.
In the heaviest period of war, from 1941 to 1942 the London rezidentura was the basic information source of Soviet operations on Germany and countries of the anti-Hitler coalition.
In September 1941 the London rezidentura obtained and sent to Moscow documentary materials on work in Great Britain and the US on the creation of nuclear weapons and supplied a constant stream of information.
Moscow cabled all U.S. station chiefs to “cease immediately their connection with all persons known to Bentley in our work [and] to warn the agents about Bentley’s betrayal.” The cable specifically ordered Gorsky to cease meeting with Harold Glasser, Donald Wheeler, Alan Rosenberg, Charles Kramer, Victor Perlo, Helen Tenney, Maurice Halperin, Lauchlin Currie, and others.
For successful work in the United States Gorsky obtained the rank of Colonel and in 1945 was awarded the Order of the Patriotic War.