Kingdom of Champions (4th Edition)
Kingdom of Champions is written as a Champions supplement, but it's also designed for use in other games. Any game with a contemporary (or near-future or recent-past) setting can involve trips to the UK, and we've tried to keep the "real world" and "possible superhero game" ideas clearly distinct. The latter draw on the former, of course, but you should be able to see where cold hard reality ends and superhero fantasy begins. Furthermore, any sensible player of a non-Hero game should be able to adapt the Hero System stats we've included. So, if your spies or detectives are UK bound, you'll find plenty to use in here.