“This section deals with activities which are strictly the duties of an employment but which, if certain conditions are met, or taxed as if they were the carrying on of the trade. It is based on section 314 ICTA.”
“27. There are useful but not conclusive dicta in reported authorities about the way in which, in general, statutory deeming provisions ought to be interpreted and applied. They are not conclusive because they may fairly be said to point in different directions, even if not actually contradictory. The relevant dicta are mainly collected in a summary by Lord Walker of Gestingthorpe JSC in DCC Holdings (UK) Ltd v Revenue and Customs Comrs [2011] I WLR 44, paras 37-39, collected from Inland Revenue Comrs v Metrolands (Property Finance) Ltd [1981] I WLR 637, Marshall v Kerr [1995] I AC 148 and Jenks v Dickinson[1997] STC 853 . They include the following guidance, which has remained consistent over many years: (1) The extent of the fiction created by a deeming provision is primarily a matter of construction of the statute in which it appears. (2) For that purpose the court should ascertain, if it can, the purposes for which and the persons between whom the statutory fiction is to be resorted to, and then apply the deeming provision that far, but not where it would produce effects clearly outside those purposes. (3) But those purposes may be difficult to ascertain, and Parliament may not find it easy to prescribe with precision the intended limits of the artificial assumption which the deeming provision requires to be made. (4) A deeming provision should not be applied so far as to produce unjust, absurd or anomalous results, unless the court is compelled to do so by clear language. (5) But the court should not shrink from applying the fiction created by the deeming provision to the consequences which would inevitably flow from the fiction being real. As Lord Asquith memorably put it in East End Dwellings Co Ltd v Finsbury Borough Council[1952] AC 109 , 133: ‘The statute says that you must imagine a certain state of affairs; it does not say that having done so, you must cause or permit your imagination to boggle when it comes to the inevitable corollaries of that state of affairs’.”
“15. We also point out what should be obvious to all concerned, which is that assertions from a presenting officer or advocate that this or that ‘would have or ‘should have’ happened carries no evidential weight whatsoever. An advocate’s assertions and/or submissions are not evidence, even if purportedly based upon knowledge of how any given system should operate.”
“With regard to the appellant’s submission that, in allowing a deduction for wages, s15 must be interpreted as being more than an alteration of the provisions under which the appellant is taxed, I consider that this is mistaken: the effect of s15 is clearly that a qualifying diver is to be taxed as if he were carrying on a trade. That is, he is taxed on the profits of that deemed trade, such that expenses incurred can be deducted if they meet the criteria to be deducted as expenses of the deemed trade. There is, in my view, no reason to extrapolate further and conclude that allowing the deduction of such expenses means that an actual trade capable of being carried on in partnership exists.”
“31. …Section 15 is about the taxation of income arising from the performance of those duties of employment but, introduced by the word ‘instead’, provides that the income is to be taxed as if, contrary to the fact, it was profits of a trade. 33. Furthermore section 15 creates this fiction not for the purpose of deciding whether qualifying employed divers are to be taxed in the UK upon their employment income, but for the purpose of adjusting how that income is to be taxed, specifically by allowing a more generous regime for the deduction of expenses. This appears clearly from the express language of section 6(5) of ITEPA, which recognises that the income being charged to tax under section 15 is indeed employment income. If one asks, as is required, for what purposes and between whom is the fiction created … It is for the purpose of adjusting the basis of a continuing UK income tax liability which arises from the receipt of employment income.”