The CAA written policy is 10 working days, and they don't budge unless the examiner states they're unavailable. It is unfortunate but that's the policy. It helps ensure standards by meaning people just pick the examiner they want. Remember their job is regulation not to keep "customers" happy
MaroonedinFL - If you genuinely feel like the examiner did you wrong, complain - until then you just come off as a disgruntled student who failed because he wasn't good enough. Hence the replies your getting. (Including mine - which was a little harsh for which I apologise.) Fly safe.