Yes that is correct. However, as long as the gun and locks are in good condition, and the stock isn't loose there is no need for them with this design.

The Westley Richards droplock is perhaps the finest action for a double rifle ever made, next to a pre-war Rigby. There was no expense spared in the manufacture of the Westley droplock, and once upon a time its was the most expensive action to produce in London or Birmingham. More than a Purdey, Holland, or Boss best sidelock ejector.

Many people are unaware of that little fact.