BGG
And so it should, IMO.
The involvement of the Police and CPS suggests *suspicion* or evidence of some form of criminal activity, and the CPS's decision not to proceed with a prosecution has clearly been made not on the grounds of lack of evidence, but on the grounds that it would serve no purpose (the inference being that one or more of the individuals is now deceased).
Accordingly, provided that operational security is not compromised, the general public has every right to know what led to the loss of an aircraft and the involvement of the Police and CPS, all of which are funded by the taxpayer.