"..... Those are very wide words. They entitle the industrial tribunal to take into account anything which it judges to be relevant. We doubt whether industrial tribunals will get much assistance in exercising that jurisdiction by being referred to cases decided on other tests under other statutes. We do not go so far as to say that they are always and in all circumstances irrelevant, but we would deprecate these very simple, wide words becoming encrusted by the barnacles of authority. The industrial tribunal is to do what it thinks is fair in the circumstances."