The Usurper: Almost like the script from "V for Vendetta", where the ultra conservative UK government creates a bio weapon to which they have a cure. But instead of using it on other countries they use it on the UK people in 3 places to create fear so that the 'high chancellor' gets the power and authority to do what he wants. Prosecution of anyone who disagrees or annoys him.. Gays, Muslims, any minority is picked on, vanished (via black bagging and taking away) .... Torture is fine, firing squads are fine.

Unfortunately America can't help as they are in the midst of a civil war.