Having been around at the time, I can say that most people were using Webleys and BSAs, with the MK3 Webley and the Airsporter being the most common. There were a few German guns around, which I suspect were brought home by National Servicemen who had served in Germany and bought them there - import duties were high in the post-war years, putting guns such as Orginals and Weirauchs practically out of reach for all but the most well off.