Gary, I don't have much knowledge on the subject except that many years ago Tim Taylor came up to my place in Aberdeen for a holiday break. He wanted to pick up old safe information and took lots of my stuff to be photocopied.
The Mersey lock came up in conversation of which I told him I knew nothing whatsoever. Next thing was a sample lock in the post. I had a feeling that he was involved with the lock in some way. Maybe that's garbage. Maybe not.
John.