I have try several times to register but for some Mysterious reasons they never kept my details, and I call to arrange a flat viewing, the answer was: the flat is gone , and when my work colleague who happen to have a British name got a viewing for the VERY same flat shortly afterwards and it happens not once but TWICE . Tadaa !!! you are busted. I have one thing to say to them DISCRIMINATION is a serious criminal offence.
So if you are from a minority group try the same technique I did if they refuse you a viewing or ..., and report that to http://www.adviceguide.org.uk or any other organisation that deal with unfairness, please keep records and proofs to provide as evidences as they are likely to deny this, and put the blame on poor training of their staffs or pure coincidence. Do not let them continue these malpractices, refusal of a public service under on the basis of race, religion, colour, religious beliefs, national or ethnic origins is against law, they can face legal charges and go out of business.