@PseudoBadger
What is your job for the other 9 years of the decade?
I do other research for the council for different projects, for example with the results of surveys of local residents who have signed up for the panel taking part in online surveys and focus groups which are done on teams now but used to meet in person. We get asked to do research with specific projects in mind to support funding bids and so, for example to do with traffic, school places, park usage and so on.
Yes,I know what sex is but it's not part of my job. If you'd seen my boss you'd understand. Seriously though, yes, I do know the difference in terms of my job,
I don't get involved in anything to do with the forms, I only get involved with the data when they have processed but I doubt that anything would happen with mistakes with university students. I expect they will get a form at their term time residence anyway as they aren't sent to individuals, looking at my unposted form it just says the householder.
I think you should give factually accurate answers as it helps to plan local services, if we get data saying that 99% of the local population are all heterosexual because those who are not haven't wanted to answer them it's harder to justify funding bids for services for minorities.
Not all of the information is out there already or we wouldn't do the census, it costs a small fortune, it's got questions about carers for example and they aren't all known about.