The 5th man from the left appears to be holding a plain-jane No.4 telescopic rifle. (unless someone can spot something out of the ordinary)
The man 6th from the left is holding a cut down rifle. I am almost certain that it is (or is closely related to) this rifle:
1943-44 Enfield No.4 Mk1* Experimental Long Branch 'Scout' Sniper Rifle
Like the rifle listed in the
Knowledge Library
, it has a cut-down stock, a totally new buttstock (rollover cheekpiece and a rubber butt), and no charger bridge. From this angle, it's difficult to tell whether or not it's fitted with the windmill-style 4 position backsight (which was mounted on the left side of the receiver) As well, this rifle mounts a different scope: the C No.32 Mk 4 (C No.67 Mk I) onto what should be a Griffin & Howe mount. (which was what the type was configured with. I, however, might be incorrect. But from I can see, it appears to be a match)