That article is absolute tosh! Starspeed probably hosts the countries finest ex-mil civilian pilots. As mentioned some are top of the food chain ex-mil and some are ex-ETPS. There is obviously more to this than meets the eye?
Williams "Hughes 500" is owned by a member of Pprune who frequents this site quite often. I won't divulge his 'handle' for fear of embarrassing him, but he is also a mate of Williams. It's registered to a south coast based company.
I suspect the Royal flight malarky is a political one and most certainly not a civvy Vs Mil thing!