“(1) If an officer of the Board or the Board discover, as regards any person (the taxpayer) and a year of assessment— (a) that any income which ought to have been assessed to income tax, or chargeable gains which ought to have been assessed to capital gains tax, have not been assessed … the officer or, as the case may be, the Board may, subject to subsections (2) and (3) below, make an assessment in the amount, or the further amount, which ought in his or their opinion to be charged in order to make good to the Crown the loss of tax … (3) Where the taxpayer has made and delivered a return under section 8 or 8A of this Act in respect of the relevant year of assessment, he shall not be assessed under subsection (1) above— (a) in respect of the year of assessment mentioned in that subsection … unless one of the two conditions mentioned below is fulfilled. (4) The first condition is that the situation mentioned in subsection (1) above was brought about carelessly or deliberately by the taxpayer or a person acting on his behalf. (5) The second condition is that at the time when an officer of the Board— (a) ceased to be entitled to give notice of his intention to enquire into the taxpayer’s return under section 8 or 8A of this Act in respect of the relevant year of assessment; or (b) informed the taxpayer that he had completed his enquiries into that return, the officer could not have been reasonably expected, on the basis of the information made available to him before that time, to be aware of the situation mentioned in subsection (1) above. (6) For the purposes of subsection (5) above, information is made available to an officer of the Board if— (a) it is contained in the taxpayer’s return under section 8 or 8A of this Act in respect of the relevant year of assessment (the return), or in any accounts, statements or documents accompanying the return ….”
“I emphasise again that the matters I have mentioned are not a comprehensive list and no single item is in any way decisive. I believe that in order to reach a proper factual assessment in each case it is necessary to stand back, having looked at those matters, and look at the whole picture and ask the question—and for this purpose it is no bad thing to go back to the words of the statute—was this an adventure in the nature of trade? In some cases perhaps more homely language might be appropriate by asking the question, was the taxpayer investing the money or was he doing a deal?”
“In order to decide whether a person carries on business on his own account it is necessary to consider many different aspects of that person’s work activity. This is not a mechanical exercise of running through items on a check list to see whether they are present in, or absent from, a given situation. The object of the exercise is to paint a picture from the accumulation of detail. The overall effect can only be appreciated by standing back from the detailed picture which has been painted, by viewing it from a distance and by making an informed, considered, qualitative appreciation of the whole. It is a matter of evaluation of the overall effect of the detail, which is not necessarily the same as the sum total of the individual details. Not all details are of equal weight or importance in any given situation. The details may also vary in importance from one situation to another.”
“ …Trading requires an intention to trade: normally the question to be asked is whether this intention existed at the time of the acquisition of the asset. Was it acquired with the intention of disposing of it at a profit, or was it acquired as a permanent investment? Often it is necessary to ask further questions: a permanent investment may be sold in order to acquire another investment thought to be more satisfactory; that does not involve an operation of trade, whether the first investment is sold at a profit or at a loss. Intentions may be changed. What was first an investment may be put into the trading stock—and, I suppose, vice versa.…”