We never pictured the Ariel Atom as a police car, but now that Ariel Motors has actually equipped one with all the appropriate police gear, it makes perfect sense. It's light, it's highly visible, it's relatively cheap to run on a daily basis and it's wickedly fast.
We would have thought that it would be difficult to add features like a police radio and an effective siren system (the speaker has to be pointed forward) given that the Atom has relatively limited room for all those things, while making such a low car visible to motorists, but Ariel has successfully incorporated all these features into the spartan Atom.