The metro was touted as the symbol of the new social order—a sort of Communist cathedral of engineering modernity. Soviet workers did the labour and the artwork, but the main engineering designs, routes, and construction plans were handled by specialists recruited from the London Underground. The Britons called for tunneling instead of the "cut-and-cover" technique, the use of escalators instead of lifts, and designed the routes and the rolling stock. The paranoia of Stalin and the NKVD was evident when the secret police arrested numerous British engineers for espionage—that is for gaining an in-depth knowledge of the city's physical layout. Engineers for the Metropolitan Vickers Electrical Company were given a show trial and deported in 1933, ending the role of British business in the USSR.