Longbranch Sniper?

[Surpmil]

Well, from the inspection stamp on that front pad, what you have is a pad or pads removed from a very early No4(T), one of the Trials No4s dated 1931 to 35 that were the first rifles converted to No4(T) spec at RSAF Enfield in 1940/41. The blue/grey finish on those rifle is quite distinctive and it looks like you have the same on those pads.

There are subtle differences in the shape of the front pad between the RSAF Enfield Rifles and the later Holland & Holland (S51) conversions and AFAIK that stamp is only seen on the rifles converted at RSAF Enfield.

There is a Trials No4(T) in Canada with the pads stripped off, and probably a few in the US. The best use of that rifle and pads would be strip them off and restore a genuine Trials (T).

The rifle has commercial British proofs so the 'slap-up job' was probably done there.