RN issue P1907 bayonet question

Afternoon all, I have been looking at a Sanderson 1910 manufactured Hook Quillon bayonet with matching scabbard, RN issued, all correct and in really good order.

As with quite a few of these bayonets, it's Enfield inspected and has its parent rifles S/N on the hilt and the scabbard.

Would it be right to surmise that these bayonets would be delivered to Enfield, inspected, marked to a rifle and both delivered to a RN Ordnance Depot together ?

If this was carried out by the RN, why did Enfield inspect them, or was Enfield solely reasonable for strength testing and X marking?

I would imagine that these small manufacturers were sub contracted by the principal contractor, Enfield to produce them. Same holds good today. You buy something from Pilkington. If the internal guts or tube, made by Phillips goes wrong, you go back to Pilkington. Who tell Phillips to get a grip[ of their QC!