Thank you all for the input gents,

The stock is only 13.5" to the front trigger excluding the pad.

The inletting is still visible from the spur at the heel, I think I'll keep some rubber on it & keep it stretched out to 14.5".

I've convinced myself that the forend tip should be horn, firstly to match the grip cap, secondly because there is no means of mechanical attachment (no pin, dowel nor screwholes) so I beleive the original was simply glued on.

The rear sight is a wonder of craftsmanship, but I cannot get a clear photo. Although it is a single standing leaf, it is adjustable by a vertical screw which adjusts the height by meaans of a vertical dovetail arrangement. The parts fit together so precisely I did not originaly notice the multiple pieces.