Eng
Quite right.
A maintained Build Standard is a pre-requisite to a valid Safety Case.
It has not been MoD policy to routinely fund the maintenance of Build Standards since 1991. Today, it not uncommon for a BS to be more than two decades out of date.
As this thread is about Tornado, I suggest a quick glance at the recommendation at para 19b in the Patriot shootdown report of 2003. There is something very wrong when a reviewing officer has to recommend basic, mandated safety pre-requisites and engineering disciplines should be implemented. Given this very recommendation was made twice, on Tornado, to different 2 Stars in 1998 and 2001, it is doubly wrong that the BoI or ROs didn't seem to know that the problem was identified, notified and completely ignored 5 years earlier by the officers directly responsible for ensuring SofS's regulations are implemented. People again. Always people.