I have found a british chat group that discusses the Dickson Mauser hunting rifle

https://www.thestalkingdirectory.co.uk/threads/john-dickson-270.129613/

it seems that in the 1980s Dickson, Rigby and Churchill used Parker Hale rifles, or military actions, with some cosmetic improvements to make a low cost hunting rifle.

thanks; I guess i have answered my own question, but might be of general interest

Don