A 1943 Long Branch.
From the bottom to the top:
1. 1943 Mk I* Long Branch (2 groove)
2. 1944 Mk I BSA (ex French, 5 groove)
3. 1942 Mk I* Savage with an early sight protector (2 groove)
4. 1955 Mk II Fazakerley (5 groove)
And, in the corner is a 1923 No. 1, Mk III SMLE, with the magazine cutoff. I did experiment with a Parker Hale rear sight on the Savage, but couldn't get the sight aligned. A Mk III ladder sight worked much better.
Weather permitting, I'll get these to the range this weekend.