I was wondering if anyone could identify this piece of metal. It was found many years ago on a local beach alongside a stack of type C Beach Mines. I have been told that it is the top of a 'mess tin mine', a sort of improvised landmine using a standard British army pattern (small) mess tin as the body. It certainly seems to fit onto a mess tin by the size and corner curves but I have been unable to find any mention of such a device anywhere. I cannot see any identifying markings on it. Any information or suggestions would be welcome.