Hello, I have bought a sporterized Lee enfield no.4 MK.1 and want to know more about it.

It seems to be a Fazakerley 1949 FTR Serial Number Y5317, The WristGuard is marked 1945 Englandicon.
Other than proof marks there is nothing else on the metal.

Are there supposed to be other marks on it?
And what does the 1945 mean, original production date, original serial, other?
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