Tony, I tend to agree. I am not sure the issues are all fire safety ones, as, for example, detectors a bit less than 500mm are likely to work fine, but it is an issue of contractual compliance. It is kind of digital. If there is a non compliance with 5839 and no variation agreed they have not done what they were required to do, nor does the system do what it says on the tin. (With regard to your question, I do virtually nothing else now other than expert witness work and training, though I do miss project work a bit but dont miss FRAs.) The correct course is to raise these with the company and then if they do not react to raise them with the SP 203 CB, who are required to record and act on complaints as part of their UKAS accreditation.