A range that is much confused both by releases with the same number, such as the WF6 "Aardvark" and Chaotic GM, and by differences between UK and UK releases.
Ral Partha added extra codes by repurposing some miniatures (WF11, WF13, and WF14). They resculpted the range once the split with Citadel was final. I don't recall seeing any Citadel UK catalogues that list WF11 up, but they are in the 1983 Citadel US and 1984 Ral Partha Imports ones. Ral Partha released the Aardvarks as Earthpigs.