“Under their powers in paragraph 4(2)(a) of schedule 11 to theValue Added Tax Act 1994 , for the protection of the revenue HM Revenue and Customs require you, as a condition of your supplying goods or services under a taxable supply, to give security to them by cash deposit or guarantee in the form of a performance bond in the sum of£45,050.00 for the payment of any Value Added Tax which is or may become due from the appellant. Alternatively HM Revenue and Customs will accept£30,000 if monthly returns are submitted.”
“ If they think it necessary for the protection of the revenue, the Commissioners may require a taxable person, as a condition of his supplying or being supplied with goods or services under a taxable supply, to give security, or further security, for the payment of any VAT that is or may become due from [him]...”
“Security under sub-paragraph (2) above shall be of such amount, and shall be in such manner, as the Commissioners may determine.”
“It is important to start by stating that it is common ground that the jurisdiction of the tribunal is only supervisory. The appeal before the tribunal is not by way of a rehearing (see, for example Customs and Excise Comrs vJH Corbitt (Numismatists) Ltd[1980] STC 231 at 239,[1981] AC 22 at 60 per Lord Lane). This was accepted in the present case by the chairman himself. He put the matter clearly and, in my view, accurately in his decision in these terms: 'The jurisdiction of the tribunal in cases such as this where the Commissioners are exercising discretionary powers has been clearly established in previous cases. It is, for instance, clear that the tribunal cannot substitute its own discretion for that of the Commissioners for the tribunal has no discretion in these matters. If it is alleged that the Commissioners have reached a wrong decision then there can be a question of law but only of a limited character. The question would be whether their decision was unreasonable in the sense that no reasonable panel of Commissioners properly directing themselves could reasonably reach that decision. To enable the tribunal to interfere with the Commissioners' decision it would have to be shown that they took into account some irrelevant matter or had disregarded 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.”