Because certain convictions, such as whether someone is a woman or a man, are legally protected, workers who hold those views cannot be discriminated against.
Although tribunals have not historically audio-recorded their hearings, that is not to say that claimants do not have a right to a copy if they ask for one.
The law says that if an employer breaches certain protocols, then the tribunal can increase recompense even if it was not clear which protocol they breached.