For England can be found here, and for Wales here. As far as I can see, the only difference is in the order of nationalities in Q15, where Welsh comes first on the Welsh version, and vice versa on the English, and Q17 on facility with the Welsh language, which is 'intentionally blank' on the English version. I understand the Scots have their own version, but I couldn't find this on the ONS website.
Some of the questions, in fact many of them, seem quite legitimate, and I have no problem about answering them. My name, date of birth, and occupation seem inocuous enough, and a few basic facts about my house are hardly something I need to keep private. My real problem is where the questions seem to have a concealed agenda, and seem to relate to social engineering and political issues, rather than simple hard population data collection. Why on earth, for example, do they need to know if my house is heated by gas or wood? It couldn't be anything to do with a fantasy-driven energy policy, could it? Or my ethnic group - gathering the evidence for more 'special treatment' for supposed minorities?
One question I will be answering in thick black permanent marker is Q41, where I get to tell them how I get to work. 'Motorcycle' is a listed option. Yay!
I'm sure I can work some oppressed victimhood in there, somehow.