“i) The Tribunal should remember that its primary task is to find the correct amount of tax, so far as possible on the material properly available to it, the burden resting on the taxpayer. In all but very exceptional cases, that should be the focus of the hearing, and the Tribunal should not allow it to be diverted into an attack on the Commissioners exercise of judgment at the time of the assessment. ii) Where the taxpayer seeks to challenge the assessment as a whole on "best of their judgment" grounds, it is essential that the grounds are clearly and fully stated before the hearing begins. iii) In particular the Tribunal should insist at the outset that any allegation of dishonesty or other wrongdoing against those acting for the Commissioners should be stated unequivocally; that the allegation and the basis for it should be fully particularised; and that it is responded to in writing by the Commissioners. The Tribunal should not in any circumstances allow cross-examination of the Customs officers concerned, until that is done.”