Cheers Kev, many thanks for your L1 expertise as ever.
It is a very interesting rifle, it's such a shame records from Enfield aren't available. It looks like some rather interesting things were going on at the factory in the early 1980's. I wonder how many rifles were built up on LithgowReceiver and TMH assemblies?
I find it very interesting that we effectively have two rifles here with 1980's Enfield markings.
It suggests that a batch of late rifles have been stripped, deactivated and reassembled as mix masters.