Somehow I am surprised but on the other hand not surprised again that you only mentioned British manufacturers

What about other manufacturers such as the German ones? I know that both Bode Panzer and Pohlschröder produced safes that were exciptional. I also know about free standing safes that feature a Kromer Differential Lock (Garny) or even a Bode Panze Tangential. Not even to mention the Arnheim safes with their unique locking mechanisms.

Hope you reconsider even if some of the mentioned above were mass produced.