.. but how long will it take to recharge between flights ?
Given the flight time from the launch site and back (I'm guessing that the operators won't be to close to the action, kind of spoils the 'covert' part), < 20 mins is not very much coverage from what is presumably a very expensive toy.
So I'd guess we can cross 'crowd control' off the list of things it's realistically useful for, how many crowds that need controlling last for less than twenty minutes ?
Firearms incidents, well, only if they're taking place outside, or in single storey buildings with very thin roofs.
Anti social behaviour ? By the time you've got the operator and his van to the area, launched the drone, reviewed the footage... well, surely it would be quicker just to send a couple of plods to have a look using their standard issue mark 1 eyeball.
So, erm, what the hell use is this thing, exactly ? Does it have some kind of inbuilt mechanism for detecting cardboard cut-outs of lara croft, perhaps ?
I'm glad that's not *my* council tax being squandered.