59% of British people describe themselves as Christians, according to the most recent census; 12% down from the previous decade. The Pew Research Center in the United States has predicted that, if the current trend continues, this number will fall to 45% by 2050. But if I were a member of a secularist organisation, I might want to pause before I became too excited.
Rowan Williams. ABC Religion and Ethics 22 Dec 2015