Ok I got some more info on the Mk2.
Seller says: ''I took the rifle apart and I didnt see any other numbers anywhere else, the barrel has "Surrey" and "18.5tonne" and BNP marks with the crown and that's it, there are no #s on the magazine or the rear sight'' The bolt stamped "1", there is no # on the magazine, ''I have a pig sticker bayo with holder, and can give your 5 stripper clips and probably around 30pcs of brass''
I also have some more pics including the bore. It comes with a 'pig sticker' bayonet.