Daryl, No problem about the photo. I have passed it onto some who has specifically requested it for journalistic or rersearch purposes. That is how it probably found its way to you. If you want a few other photos of the guns you can find them at
http://www.heritageguns.co.uk/Warrilow%2012b%20SLNE/Warrilow%20SLNE%20Details.htm.John, Joe actually posted a photo of the internals of his locks earlier in this thread. Although the locks are very likely the originals, the action is almost cirtainly not. It was a dedicated Jones Rotary Underlever action, made with a hinge pin for a breechloader, probably bought in as a forging from the trade and adjusted to suit.
Of course they may have reused the original wood for the forend but the iron would have to be new as a muzzleloading gun wouldn't have one.