The 1943 and BA10929 on the wrist show it's a 1943 ROF Maltby rifle.
The "ENGLAND" on the receiver ring is a early country of origin mark that some importers used before the 1968 NFA law. Think of it as a "pre import mark"
The marking on the end of the barrel are Brit proof marks indicating it has tested and release for private sale in Britain.
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