Bums on Sunday pews is about the most objective measure of a country's religiosity. Which makes the UK a very irreligious country. Atheism is an artificial construct in the minds of believers. They invented us. You could say that every animal and plant and microbe becomes an atheist as soon as someone comes along to say that there's a God. Then the more deluded of them, all humans as it happens, join that someone's club and stop being the thing that the club had to invent. Suppose there was a planet out there inhabited by super-intelligent beings to whom the possibility of a God's existence had never occurred. There would be no atheists on that planet. But as soon as one of them declares that there's a God, then anyone who doesn't sign up with him is an atheist. He invented atheism on that planet. You can't have atheists without believers. When you invent God you also invent atheists. Oddly, the new atheists won't feel any different, do any different or think any different, even though they are now something they weren't before. Anyone who says they are certain there is no God isn't thinking straight. I'm an alleged atheist (I don't know of any more convinced ones than me) but I don't know whether there's a God or not, and Richard Dawkins agrees with me. So there really isn't much point asking people if they're atheists. They may not know. More likely, going from the pathetic bums on pews figures, they may not care. They'll say anything just to get rid of the interviewer. Hope this helps.