...in O'Kelly v. Trusthouse Forte plc is one that is entrusted to the Industrial Tribunal and unless one can show a clear self misdirection, to use Sir John..., as this Tribunal is, to questions or issues of law. That is a matter which was dealt with in a manner which is binding on us by the Court of Appeal in O'Kelly v. Trusthouse...Forte plc [1983] IRLR 369 in which both Sir John Donaldson, then Master of the Rolls and Fox LJ, dealt with the difficult question involved in this type of problem...