Cockney Steve:
Are SID's complied with?
Thread drift but I'll bite.
A couple of comments.
SIDS are only mandatory in the USA for Air Transport aircraft. If things were so bad why were they not made into an AD which is mandatory for all aircraft?
If an aircraft has been maintained properly, and looked after during its life so far, then the SIDS will generally not find anything of major concern.
With the aforementioned in mind, and knowing the penchant in the UK for doing things by the book, I'm surprised by your comment
"the many horror-stories resultant from SIDS inspections"
The only horror stories have been the eye watering amounts that some owners have been charged for the work.