Reminder that "Holdsworth the shop" and "Holdsworthy the factory" became two very distinct operations. Nick Kilgariff (RIP) was a "library" of infomation includng a huge collection of catalogue and advert scans. You can dig around and see how during the Holdsworthy ownership of CB there was almost a full overlap of certain models with Holdsworth that only differed in the names given.
https://www.nkilgariff.com/Models.htm