Very nice!
Isn't that a Long Lee action w/a charger bridge added? as opposed to a No1MkIII action w/a reworked charger bridge.
No manual safety on the left side like a No1MkIII.
My CLLE is set up the same way as this,,no safety except the half cock on the striker but the charger bridge on mine is strictly post 1907 SMLE style. No cosmetic reworking dispite being a commercial offering w/a retailer marking on the bbl.

What ever it is,,it's a beauty of a rifle in a great caliber,,congrats!