"What the words 'best of their judgment' envisage, in my view, is that the Commissioners will fairly consider all material placed before them and, on that material, come to a decision which is one which is reasonable and not arbitrary as to the amount of tax which is due. As long as there is some material on which the Commissioners can reasonably act then they are not required to carry out investigations which may or may not result in further material being placed before them"
“… there are dangers in taking Woolf J's analysis of the concept of “best judgment” out of context … the tribunal should not treat an assessment as invalid merely because it disagrees as to how the judgment should have been exercised. A much stronger finding is required; for example, that the assessment had been reached “dishonestly or vindictively or capriciously”; or is “spurious estimate or guess in which all elements of judgment are missing”; or is “wholly unreasonable”
“HMRC submit that … the inaccuracies in Two Bros’ VAT returns were attributable to deliberate but not concealed behaviour … HMRC submit that, as the directors who ran the business, Mr Babar and Mr Johngir must have known that they were not recording all cash sales, they had no evidence to substantiate zero rated sales [the Statement of Case subsequently sets out the revised position after material was provided following ADR, modifying this statement] and, that they had claimed input tax in excess of what was evidenced. HMRC submit that it is clear that inaccuracies on such a scale could not have arisen from mere oversight.”