The only thing which surprises me is that Mikey is surprised by the results of the survey. A quick perusal of any threads about religion on AB would seem to suggest that believers are very much in the minority here.
Similarly, apart from one Roman Catholic, I can't think of any of my friends and acquaintances who aren't either atheists (as I am) or agnostics.
A quarter of a century ago, when I was teaching, at one time we had exactly 50 teaching staff in the school I worked at. 3 of them were Christians, with the 47 others all being either atheists or agnostics.
Even half a century ago, when I was still at school myself, Christians were very much in the minority among the pupils. (I don't recall any other religion being represented at all).
So I'm always amazed when surveys seem to find that large numbers of people in the UK are still 'religious'. I suspect that, particularly among the older age groups, some people simply tick the 'C of E' box because that's what they were brought up to do. (Both of my parents would have said that they were 'C of E' if they were asked about their religion but neither of them actually believed in God!)