The RA defiantely wanted a replacement for PID for their GMLRS and AS90s - prior to the H450 and Watchkeeper they had BAeS Phoenix (nicknamed the 'f*** off' because that is exactly what it did!).
However, times have moved on and with the advent of Predator/Reaper then Watchkeeper seems 'old hat'. There was a move to arm it a while back but I think that has fallen away. Then there is the disaster of being able to operate it from a field with arrestor gear that also hasn't come to fruition. So in short the Army have paid a fortune for something that operates from a forward airfield, only has line-of-sight technology, has inferior sensors to the rest, limited endurance, high noise signature and is running late.
Should have stuck with the H450 or looked at something like Gray Eagle (US Army version of Predator). But hey, that's the old 20/20 hindsight.
LJ