They won't have been using it for long as they quite justifiably had the rug pulled from under them before they got too far with L1A1 production. I seem to recall that the biggest part they got around to producing was trigger mech housings and even then there were thousands rejected that had to be rectified at BSA when they took over from Faz
Incidentally, the Government were so frightened of the consequences of the workers taking over the factory that the Security 'arrangements' at Fazakerley involved an Armed Police there