“…consider whether the commissioners have acted in a way in which no reasonable panel of commissioners could have acted or whether they had taken into account some irrelevant matter or had disregarded something something to which they should have given weight.”
“In my judgment, in exercising its supervisory jurisdiction the tribunal must limit itself to considering facts and matters which existed at the time the challenged decision of the commissioners was taken. Facts and matters which arise after that time cannot in law vitiate an exercise of discretion which was reasonable and lawful at the time that it was effected…”
“It is undisputed that our jurisdiction is supervisory only. That is, if we are to allow the appeal, we must be satisfied that the decision was one at which the Commissioners could not reasonably have arrived. That understanding of the law derives from the judgments of Farquharson J in Mr Wishmore Limited v Customs and Excise Commissioners[1988] STC 723 , of Dyson J in Customs and Excise Commissioners v Peachtree Enterprises Ltd[1994] STC 747 and of the Court of Appeal in John Dee Limited v Customs and Excise Commissioners[1995] STC 941 . The cases show that we must limit ourselves to a consideration of the facts and matters which were known when the disputed decision was made, so we cannot take account of developments sine that time, and we may not exercise a fresh discretion. In other words, if the decision was flawed we must allow the appeal and leave HMRC to make a further determination if they so choose. If we are persuaded the decision was flawed but that, had HMRC approached the matter correctly, they would inevitably have arrived at the same conclusion, we should dismiss the appeal.”
“the legislation is concerned with protection of the revenue. It does not suggest that this objective is intended to be balanced against, or subject to, the objective of enabling the person upon whom the requirement is imposed to continue trading.”