Many a true word and all that.so a double bluff type security arrangement then
Thanks to the police and others we keep using the word 'secure' but that's not the word used in the law, which is a small but important point. We are legally required to keep our guns in safe storage in order to prevent unauthorised access. This does not necessarily even mean a cabinet and certainly doesn't demand that a cabinet have twin 7 lever, double throw, double sided locks that only allow key removal when locked. Just for the sake of perspective: If I was determined to break into a cabinet I'd use an angle grinder. I doubt if there are many cabs out there that would take more than a couple of minutes so who cares how splendid the locks are.
Working out how to keep the keys safe and ensure that they can be located by executors should the worst happen, is not really a strenuous intellectual test is it?