If it's separation of church and state you're looking for, in the UK we have the National Secular Society. They're an activist group though, not a religion. There are probably other secularist groups worldwide, I think the Freedom From Religion Foundation does the same thing in the USA.
If it's separation of church and state you're looking for, in the UK we have the National Secular Society. They're an activist group though, not a religion. There are probably other secularist groups worldwide, I think the Freedom From Religion Foundation does the same thing in the USA.