Found them on the 2011 census website we did.
The 2011 census data site is a bit of an internet rabbit hole. Having started browsing I spent a surprisingly long time discovering data about the area where I live.
I thought the religion section was particularly interesting. There were religions I had never even heard of. In fact, some of the categories themselves are quite intriguing, although the supporters of the campaign to get heavy metal recognised as a religion will doubtless be disappointed to see themselves listed as “No religion: Heavy Metal”.
Should you wish to disappear down the rabbit hole for yourself, you will find the UK 2011 census data at http://www.ukcensusdata.com/
Thanks to Blue Witch for the link!