"The position, as it seems to us, is this, this being a question as to jurisdiction, the Industrial Tribunal should have taken the point themselves even if the parties did not and they cannot merely by silence confer upon themselves a jurisdiction which they do not have. Equally, it would be open although the material facts have not been found because the point had not been taken for this question to be dealt with upon this appeal because if there is no jurisdiction, then equally we ought not to embark upon the matter."