At the end of UKproduction of the No4 tooling/machinery was mothballed - now the story develops.
Option 1) BSA tooling was sold to Pakistan (POFWah)
Option 2) The Fazakerley tooling and machinery was sold to Pakistan. (POF Wah)
The BSA version is the 'common' internet story, but those who were there at the time suggest it was in fact Faz tooling that was sold off.
This gains more credence when you consider the Faz tooling produced the No4 Mk2, whilst BSA never produced the MK2
Pakistan primarily (initially) used the tooling for FTR rebuilds but it later emerged that they built up 'new' rifles, typical markings of the 'new-builds being :
No 4.MK.2
58/P.O.F./C117XX
And the Star & Crescent (Pakistan version NOT the Turkishversion)
These new-built action & barrels have been seen with salvaged BSA, Savage and other manufacturers 'small parts'.
India has been at (almost non-stop) war with Pakistan and has acquired (captured / pick-ups ?) many No4 rifles.
Maybe some one has more to the story as to the FTR work Ishapore may have undertaken on the POF captured rifles.