A study of No.4 Mk.I "Trials" rifles: information requested!

[Surpmil]

It's a VERY early rifle built at Fazakerly(? on a leftover trials body (receiver).

The simplified cocking piece is very unusual, and we wouldn't expect to see a Long Branch pressed safety catch spring either on such a rifle AFAIK.

However the finish is a close match, so perhaps they have been together for a long time. The screw is different from the standard as well.

I see the Enfield "D/E" hybrid mark on the safety catch and that is what we would expect on such a rifle.

Does it have the "waisted" foresight protector, hinged upper band and other such trials rifle features?