Daryl,
Don't know how you came by the photo of the Warrilow Bently Patent, it is actually a photo from my web site, taken by yours truly of one of my restored guns. I am very happy for my photos to used as a resource but would appreciate a credit where appropriate.
Yes it is a totally barrel cocking action, there is no way that you could let the hammers down safely. The safety is automatic. It even has proper interceptor sears.
Joe's WM&G 16g was definitely a muzzle loader conversion, the barrels were fitted to table lumps as I remember and ,yes, the hammers do look a bit out of place but, although it is a 'hammerless' centre fire, there is no facility in the action for lever nor barrel cocking so hammers it had to be!