Dave
"That's it.
It's almost impossible to tell the two apart in a view from the rear like that one. From the front it's a bit easier.
I cheated.
"
No you didn't cheat - you just went the reg. route while I relied on the Mark 1 eyeball- recognition- system, which as you say can't see the revised engine cowling from the rear view given.
All's fair.........
Cheers Ian