Yes, I was quite surprised when I found that what I had always thought of as one of the classic post war rifle designs was a copy of a German one...& not the only one, according to the Thrale book. See also Falcon, Junior etc.
Another of my interests is motorcycles, & the (in)famous BSA Bantam is a copy of a DKW(?) design, allegedly.
Recently I was reading an old bike mag. The quintessential BMW is a flat, horizontally opposed, air cooled twin, first made c. 1923 - bears a strong resemblance to an ABC (All British Cycle) motorbike of an earlier year.
ATB
Bru
Webley Mk3 x2, Falcon & Junior rifles, HW35x2, AirSporter x2, Gold Star, Meteors x2, Diana 25. SMK B19, Webley Senior, Premier, Hurricane x 2, Tempest, Dan Wesson 8", Crosman 3576, Legends PO8.