FYI, this is a single bevel, both sides ground equally. The Ray Mears Woodlore is also that type grind.
As for copying a design, that orignally was an Alan Wood design, Ray changed it to suit his taste somewhat and had his logo implanted on the blade. The Woodlore knife has been on back order for a long time now, not accepting orders either. There are several UK knifemakers with exact duplicate design knives and selling them as fast as they can make them. There is a demand and knifemakers are filling the void.
I have plenty of knives and until I owned a few with a Scandanavian grind, I didn't give them much thought. Now I see the advantage of the bevel and it can sure be sharpened easily. As far as the term single grind goes, that means there is one bevel to the point, where a knife like a Buck or Cold Steel had a double bevel, two angles from the blade to form the edge, instead of one...single grind is a proper term. The Bushcraft style knives do not have a "chisel grind" that would be one side beveled. Knives primarliy always have 2 sides beveled, single or double grind. Here is the opposite side