This article seems to be trying to make the use of drones seem ominous but that's really simplistic. A drone is a tool. They talk about flying drones over large gatherings but before drones they'd just have a dude with a camera go up a tall building.
When there's large gatherings it can be helpful to spot crowd surges or crushes to be able to see things.
Of course these things are open to abuse, but how many cases of abuse have we seen with basic police on foot?
It's not the technology we should be worrying about but the officers who are abusive.
While I see the good bits of Proportional Representation, it does give extremism a foot in the door. Remember this is the voting pattern in a FPTP system, one of the tabloids even encouraged reform voters to switch to the Tories because of tactical voting. Changing the voting system gives these far right anti human rights parties a much better chance.