Is there a third way?
I think the thread is pointing towards, for each type in service, they either;
Write the book from scratch.
Or,
Go back to version 1 and amend it carefully with full input from manufacturers and engineers. Documenting along the way.
The MoD should of course, stop flying until the books are complete, and procedures are in place. But only if they want stop people dying in them.
Unthinkable perhaps.
How unthinkable is another preventable death?