“… it seems clear that the effects of changes in the VAT legislation, of the increase in conference activity, and of the increase in the overhead expenditure (including capital expenditure) occasioned by the greater demands of conference attendees, all meant that over time the 20% figure, even if it fairly reflected related overhead and other residual properly recoverable VAT in 1973, ceased to do so at some time in the twenty-four years in which the Guidelines operated. But with any special methods circumstances will change and the method become more or less fair or reasonable. But such a change in circumstances does not mean that the original method – or the continuing method until it is changed – does not give the taxpayer his rights to the recovery of input tax given by the Directive. On the evidence before us we conclude that the percentage formulae were calculated so as to deliver to universities and colleges what at the time was thought to be a fair approximation of all the residual input tax to which a taxpayer was entitled in respect of those particular activities. … We conclude that overhead residual VAT was included in the 20, 20 and 5% formulae.”
“In any case where, for any prescribed accounting period, there has been paid or credited to any person – (a) as being a repayment or refund of VAT, or (b) as being due to him as a VAT credit, an amount which ought not to have been so paid or credited, or which would not have been so paid or credited had the facts been known or being as they later turn out to be, the Commissioners may assess that amount as being VAT due from him for that period and notify it to him accordingly.”
“The Commissioners riposte by arguing that this complaint of unfair treatment is essentially one about their conduct. It is not a point involving the facts of Lombard’s individual case or the law applicable to those facts. The proper remedy for unfair treatment is judicial review, not an appeal to the tribunal. The tribunal is not a body entrusted with a supervisory, public law, jurisdiction. Here there is a question of discretion involved. I think the Commissioners are right. The actual decision impugned is that to invoke unjust enrichment in the case of Lombard . It is not a decision to invoke unjust enrichment in the case of Lombard but not others. That is what happened in fact but there never was a decision to that effect.”