It's been a long time since England has had a revolution.
This is mainly due to the indigenous inhabitants mortally afraid of making a scene and causing themselves any embarrassment.
Jack Danton is just such an Englishman; though, he has accidentally become embroiled in a plot to kill thousands of innocent people and make the capital uninhabitable for several generations. The Underground map is about to become redundant too. While not Jack's finest hour, in all fairness, he was only trying to find love. And, we've all made a mess of this at one point in our lives. Maybe not to the extent of destroying a whole city, but, shit happens.
The great terror is alive in London, only the best minds can stop the carnage that will make the Blitz look civilised in comparison. Which is a shame when you see the idiots charged with this task. Not that those carrying out such a heinous act are any great shakes in the brains department. But, that's the way of the world these days, getting the right people to do anything is such hard Work.