So not all candidates have equal chances after all, right? Or do they? Hard to say.
There is nowhere in the world I am aware where human beings do not have inherent biases: we are fallible and imperfect. This is a simple reality, and I don't believe that things are any worse in the UK than in other countries. Of course if people are sufficiently determined (and themselves biased) they will find 'evidence' to support their theory of conspiracy simply because the white guy was appointed rather than the woman, or a woman was appointed rather than the ethnic minority guy, or the ethnic minority candidate must have been favored unfairly........ In my many years of serving on a committee I have been aware of individuals with particular outlooks, but not of an inherently biased committee. I have colleagues of many nationalities who have graduated from many different institutions. All you can do is, if selected, go to an interview and be the very best candidate you can be.
Don't start out with the assumption that the system is against you - I have interviewed people who seem determined to prove they are being discriminated against even when this is not the case. I suppose we are grateful that they prove themselves to be a problem at interview, thereby saving us from future difficulties had we appointed them. Search committees become alarmed by paranoia.