Umm.. So I'm trying to find out if this survey is legit and I can't find a mention of it on https://www.research.ox.ac.uk/Area/coronavirus-research or by googling "onlinesurveys coronavirus-disease-covid-19-in-the-uk-community site:ox.ac.uk"?
So you’re going to test me and not tell me the results despite the fact I might kill a vulnerable member of my family if I come into contact with them? Yeah go fuck yourself
What's the point of not telling you if you tested pos or neg? Are they afraid that with your responsible behavior you can spoil the results by not infecting more people? Are they studying how widespread it is at a given point in time, or are they studying how it is spreading?
I'd guess that if they tell you the result, they'll bias their volunteer pool towards those who want to know if they're sick - presumably because they've got symptoms - rather than getting a less biased sampling more representative of the average population.