For example, our Home Office dictates some quite important specifications and requirements, which a typical US standard would not (and do not) meet. (And if they claimed to, GCHQ and most of our designers would want to know how, as it's very difficult!).
Care to expound upon that statement?
Exactly what would prevent the US builders from meeting those specifications and requirements?
What are the specifications and requirements that are so "difficult" to meet by non-UK builders?