Quote Originally Posted by Peter Laidlericon View Post
I hope someone will also chip in and agree that this was a last gasp of the industrial strike bound Fazakerley factory to become commercially viable by selling off new No4 Mk2 rifles to the commercial gun trade. The gun trade would allocate their own serial numbers.
This is probably as good an assumption as would be reasonable. The Mk2 serial numbers in 1949-54 began with PFXXXXX, then the 1954-56 models began with UF. Few were made in 56. So yours may be made up with the random parts that were left in the factory that weren't under contract. The serial number isn't common.