The UK has armed its Watchkeeper drones with Hellfire missiles, according to ‘The Strategy Page’. The report has apparently not been confirmed by UK Ministry of Defence.
Watchkeeper is a medium range, long endurance drone based on the Israeli Hermes 450. The UK spent one billion pounds updating the Hermes 450 prototype, renaming it Watchkeeper, then basically mothballed the drone as it used its more effective US-purchased Predators drones to conduct campaigns of assassination in Afghanistan, Iraq and perhaps elsewhere.
Arming of Watchkeeper can be viewed as a UK MOD attempt to make the white elephant Watchkeeper look more relevant, as the MOD itself uses the more deadly Predators almost exclusively. Acting with the US, the UK has carried out countless armed sorties in Afghanistan and Iraq, killing a large number of individuals, most of whom were likely innocent civilians.