In view of that I would include the chief rabbi, imams, Gurus and Give the ermine to Messrs Dawkins, Copson and Terry, Keith, Sashi and of course Jim and chuck in Rhiannon and Bluehillside for good measure.
So you would compound the 'wrong' by making it more wrong, noting that most people aren't members of the CofE, a Jewish religious organisation, a member of an Islamic religious organisation, a member of the BHA, NSS etc.
What you do is further compound the error by further distorting membership on the basis that somehow religious and non-religious 'belief'-type organisations should gain special privileges.
It reminds me of a recent panel put together to report on 'Faith in Society' - noting that about 90% of people in society aren't members of a religious organisation and about 99.xxx% aren't members of the NSS. The panel was pretty exclusively composed of senior leaders of organised religions or prominent members of those religions, plus (I think) Copson. So the panel were not representative of about 90% of the population.
What did they conclude - well blow me down - that there should be more prominent role for faith organisation in society - knock me down with a feather. Had the panel been much more representative - perhaps 2 prominent faith leaders, one prominent member of NSS/BHA plus 25 people who aren't actively religious do you think they's have come to the same conclusion?