JP, I think the RWTS para 7 summary says it all:
As such, RWTS deem it imperative that, in the strongest possible terms, the RAF should be provided with a recommendation to cease Chinook HC2 operations until the conditions in paragraph 6 are satisfied.
With my ex-RAF staff officer hat on, I'm not sure RWTS had anything else they
could do; they have made a very strongly and direct statement and not the typical read-between-the-lines staff officer type message. If you are wondering about their post-accident actions, then that is indeed a different question and well worth pursuing, regardless of the perceived cause of the crash.