Northrop Grumman brought the Firebird to Fairford for RIAT. RIAT is a big public show but it has developed a significant trade element to it and Firebird was clearly aimed at that audience. It is a Scaled Composites design (with Northrop Grumman having bought Scaled a while back) and, while it has a cockpit, apparently it has the option to be flown unmanned. I don’t know whether this is well tested or not. Nor do I know the state of production examples. I believe the one at RIAT was the prototype.
It was parked in the static park for a portion of the time I was there. I did see it getting towed across to the north side at one point, presumably so it could be parked in a hangar rather than left out. Supposedly, there is a US Government order for some of these and I imagine they will be fitted with some interesting systems. Whether I shall ever see one is a different story.