“The Respondents sought to rely on three distinct matters to justify 25 their assessment. These were as follows: (a) some sales were recorded while the till was in training mode and those sales were not reflected in the Z readings; (b) some credit card sales were not reflected in the Z readings; and (c) certain purchases and observations made by test purchasers were 30 not reflected in the Z readings.”
“29. The way in which the Respondents calculated the suppression percentage of 16.68% was to use the average of the suppression percentage relating to the use of the training mode (18.39%) and the 35 suppression percentage relating to the purchases and observations made by the test purchasers (17.74%). They did not take into account the suppression percentage relating to the credit card sales that were missing from the Z readings (26.92%). At the hearing, Mrs Bush explained that this was because it was difficult to be sure about the 40 latter percentage given that it depended on consistency of sales during the relevant day and so, given that it was a higher figure, she had effectively given the Appellant the benefit of ignoring it entirely in reaching the average suppression percentage. We do not see how the fact that the higher suppression percentage potentially arising out of 45 the missing credit card sales was not taken into account in calculating the average suppression percentage in any way vitiates the conclusion that the Respondents made the assessment to the “best of their 6 judgment”
“(2) The Upper Tribunal may- (5 a) admit evidence whether or not- (i) the evidence would be admissible in a civil trial in the United Kingdom; or (ii) the evidence was available to a previous decision maker; or 10 (b) exclude evidence that would otherwise be admissible where- (i) the evidence was not provided within the time allowed by a direction or a practice direction; (ii) the evidence was otherwise provided in a manner that did not comply with a direction or a practice direction; or 15 (iii) it would otherwise be unfair to admit the evidence.”
“27. HMRC had accepted in the hearing before the Upper Tribunal, as 30 they normally did in all cases, that they had a duty of candour in the Tribunal and in particular that, even if the Tribunal only ordered disclosure of documents on which each party relied, HMRC would disclose all relevant material held by them.”
“…But the fact that a different methodology would, or might, have 15 led to a different—even to a more accurate—result does not compel the conclusion that the methodology that was adopted was so obviously flawed that it could and should have had no place in an exercise in best judgment.”
“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 35 tribunal should not allow it to be diverted into an attack on the Commissioners’ exercise of judgment at the time of the assessment.” ”