Warren agrees with you Peter.To be honest, and it is rather grainy I agree but that looks distinctly like a front ray shade with a different colour of material/brass(?) on the first 2" of the telecope tube. Note the 1" or so gap between the rear of the ray shade and the turret. Looks like a Mk1 or 2 to me on that basis.
The confusing thing is, it looks to me like it has a turret on the right side...and you can't flip a No 32 scope over as it has that alignment screw that engages the mount.
I suppose the negative could be flipped? Don't think so though.
Frustrating picture...on a number of levels.
They do look like a pretty good target for a burst of Bren Gun fire though. 3 in 1.