I had the dubious pleasure some years ago of attending a "Watchkeeper" presentation by a civil servant at a UAV conference that I was also presenting at in London. Having previously worked on Phoenix systems , I was naturally distrustful of what might emerge.
Listening to all the project management timetable mumbo jumbo speak about "main gate " etc.etc. and noting that the speaker had no idea whatsoever about what the operational profile of the beast implied, I was doubtful as to when such a system might be usefully employed.
My comment: "Why not just buy from the Israelis? " of course fell on stony ground.