Esay Street
I think your excellent points are best answered or explained by the mandated regulation calling for continuous assessment (of safety). Also, the associated positive feedback loop, which eliminates the need to assume (in this case, receipt, or otherwise, of servicing bulletins).
How can we have continuous assessment if (a) funding is cut by 28% per year to conceal waste and, (b) posts are chopped as the cuts mean the staff cannot do their work and are sitting idle? (In January 1993, when we were told there would be no funding to maintain safety, we were advised to ship out and seek jobs elsewhere. 38 of us left, in my case returning to MoD(PE); only one stayed. That's a lot of experience to lose in one year, and have no means of replacing it. Not that the Chief Engineer wanted to).
Both Haddon-Cave and Lord Philip, plus every ART report I've read, mentions the failure to implement this policy in one way or another.