EXACTLY.......... Listen to Bindi Spaz86. The rifle is exactly as it left UKservice many years ago. Those odd parts people talk about and all this '......take it back to original....' stuff is a bit nonsensical. It was only original once and it ain't never going to be original again, just like my restored Mini Cooper ain't original again.
And for the zillionth time on this forum, let me say - again - here's something else, straight from the horses mouth. In all my years as a real Armourer, I NEVER, ever, never recall hearing another Armourer searching through bins and trays and boxes of parts trying to find all the same manufacturer. It might have happened but I was off sick that day! And another thing. Maltby, where your rifle was made made the major parts but their rifles were assembled using parts made throughout the whole of the UK. We assembled the rifle to the current specification then test fired it. And if it passed EVERY check and test, off it went.
Just leave the bloody thing alone. If it's not broke, don't fix it! Let me see the butt plate and I'll tell you whether it fits