Dawkins suggest we are not, because fewer than the last census would tick the box. He further goes on to say that those claiming it don';t believe it.
We'd best leave aside the point that when asked to give the full title of the Origin of the Species he did say "oh God!".
So, are we a Christian country, and if we are, how are we? Th examples of prayers before meetings seem to me to be historical and traditional. No new group formed even suggests that prayers would be welcome or necessary. We have a head of State who is the head of the State religion, but again, this is very historical. Does it make a difference that we are a Protestant Christian country? I know that Saundthorpe pbuh, used to be fond of making the point that we lived in a Christian country, but was less happy with the thought that we were a Protestant Christian country.