I thought it was. It was when I worked there, and I've heard nothing to the contrary. ..
Airservices has
never been a GBE, despite what the wannabe smartest guys in the room have been saying since 1995. (Not suggesting, BTW, that you should have been aware that the warm feeling spreading down the side of one of your legs was, in fact, something really icky disguised to make you feel comfortable ...)