Unreleased unseen Heroquest (?) prototype figures (Bryan Ansell's collection)

This is potentially something a bit special. I say "potentially" because there's a bit of a mystery surrounding the origin of these figures. They were all found in a zip-lock bag in Bryan Ansell's collection with "HEROQUEST" written on the bag in marker pen. Although I can say for sure these are unreleased sculpts, I cannot be certain on their link with Heroquest. First the figures, then the reasons for why they are a mystery:

Barbarian