This is tantalising. Whatever could they have produced? I don't mark down BSA for a CO2 company, but what kind of springer or PCP could they be cooking up? Maybe a spring operated 1911 as a development of the old 240 Magnum? A PCP version of the Mauser C96 Broomhandle, with blow-back? A PCP Lee Enfield rifle?
I hope it won't be some kind of rebadged Gamo plinker.
From the IMFDB Season One of Peaky Blinders has the following pistols and rifles in it...
1 Handguns
1.1 Webley .455 Mk IV
1.2 Webley .455 Mk VI
1.3 Mauser C96 "Broomhandle"
1.4 Mauser C96 "Bolo" model
1.5 FN Model 1900
1.6 Webley & Scott Mk I
1.7 FN Model 1910
1.8 Luger P08
1.9 Harrington & Richardson Premier 2nd Model
1.10 Webley Royal Irish Constabulary
2 Rifles
2.1 Lee-Enfield No.1 MkIII Rifle
Nothings jumping out ...