Millenials leaving religion and not returning.
Millennial's are leading a cultural change in both religion and politics. That's why there's a war on Millennial's being waged by the media and establishment. As with society and religion, both structured as a socialistic means of drawing society together in a common cause, agenda if I may. People in both arenas vastly denying the socialist nature. The Millennial's are stepping away from the fake religion arena and attempting to put the true socialistic nature into society. Religion oppresses its supporters while within society socialism in a truer form can open society to a more productive equality for all.
The British have been abandoning religion for maybe as long as 80 years. Masses of churches are empty or used for something else.