Years ago, Weller & Dufty’s, London Auctioneers dealing mostly in Firearms and related items, sold off the last remaining Vickers Pedersen Rifles in the UK ( about 1980s).
The “provenance” of these Rifles was the stores of Vickers Ltd (By then Vickers-Ruwolt), and part of the “Sales Pitch” was that during WW II, these rifles were issued to Vickers Ltd. own internal security units and HG units, since it had several factories involved in War Production.
As to the truth or otherwise of this story, it sounds feasible enough; Given that at the end of the 1931 Trials, all the rifles were returned to Vickers Ltd, and probably some of the ammo as well ( R^L and K manufacture). It is unknown whether Vickers tried to sell these off, or promote the design before WW II…Japan did experiment with the Pedersen Design in 6,5mm, in both Military Arsenals and Private manufacturers Maybe Japan acquired some examples from Vickers in the early 1930s? Japan had acquired Vickers and Lewis Guns in the mid to late 20s, and of course adopted the 12,7mm (Semi-Rimmed) 0,5" Vickers design ammo (albeit with Breda Improvements).
Some of the V-P rifles were allegedly sold off in the late 1940s-early 1950s…
BTW, I actually viewed and handled the 1980s-sold example here in Australia in 1983-4, at a Collector’s meeting…I was the only member who correctly Identified it for what it was.( besides the owner). I don’t know whatever happened to it after that…maybe it was destroyed in the 1996 Confiscation & Destruction of Semi-Autos (or worst still “Deactivated” into a boat anchor!!!.
PS as to HG rifles, the WW I Bannerman Springfield Put-togethers in .303, were by then in the hands of the British Movie Industry (Movie Gun Hire), and showed up in the 1970s TV series “Dad’s Army” ( about the antics of the HG in the south of England) and although most of the scenes use M17s and the occasional Lewis Gun, the “Title” and “End” scenes use the Bannerman Springfields…go figure. These 1,000 rifle donation by Bannerman in 1915 had been rejected for service as “unsuitable” ( reason not given…probably repair and maintenance considerations) and at the end of the war, along with many other “non-standard” Rifles sold off “to the Trade”…and the Bannerman rifles went to the Movie Industry… ( nobody wanted them)