I picked up these packs of Under Fire Miniatures U.K. police from Paul at the club. These were relatively straightforward, painted NATO black, dry brushed German grey, then basalt grey. Helmets are Royal blue, check bands on hats and the "Police" label on the backs were picked out in Ivory.
These will go well with the previous figures from Elhiem linked below;
They even have the start of a group of villains/terrorist opponents; these from Stonewall Miniatures.
Thanks for looking.