“703. Cancellation of tax advantage (1) Where— (a) in any such circumstances as are mentioned in section 704, and (b) in consequence of a transaction in securities or of the combined effect of two or more such transactions, a person is in a position to obtain, or has obtained, a tax advantage, then unless he shows that the transaction or transactions were carried out either for bona fide commercial reasons or in the ordinary course of making or managing investments, and that none of them had as their main object, or one of their main objects, to enable tax advantages to be obtained, this section shall apply to him in respect of that transaction or those transactions. (2) For the purposes of this Chapter a tax advantage obtained or obtainable by a person shall be deemed to be obtained or obtainable by him in consequence of a transaction in securities or of the combined effect of two or more such transactions, if it is obtained or obtainable in consequence of the combined effect of the transaction or transactions and the liquidation of a company. (3) Where this section applies to a person in respect of any transaction or transactions, the tax advantage obtained or obtainable by him in consequence thereof shall be counteracted by such of the following adjustments, that is to say an assessment, the nullifying of a right to repayment or the requiring of the return of a repayment already made (the amount to be returned being chargeable under Case VI of Schedule D and recoverable accordingly), or the computation or recomputation of profits or gains, or liability to tax, on such basis as the Board may specify by notice served on him as being requisite for counteracting the tax advantage so obtained or obtainable. [(4)-(12) contain administrative or consequential provisions] 704. The prescribed circumstances The circumstances mentioned in section 703(1) are— A. That in connection with the distribution of profits of a company, or in connection with the sale or purchase of securities being a sale or purchase followed by the purchase or sale of the same or other securities, the person in question receives an abnormal amount by way of dividend, and the amount so received is taken into account for any of the following purposes— [(a)-(c)] or (d) the application of franked investment income in calculating a company’s liability to pay advance corporation tax, or ... [(e)-(g)] [B – E specify, in detail, other prescribed circumstances] 709. Meaning of ‘tax advantage’ and other expressions (1) In this Chapter “tax advantage” means a relief or increased relief from, or repayment or increased repayment of, tax, or the avoidance or reduction of a charge to tax or an assessment to tax or the avoidance of a possible assessment thereto, whether the avoidance or reduction is effected by receipts accruing in such a way that the recipient does not pay or bear tax on them or by a deduction in computing profits or gains. [(2)-(3)] (4) For the purposes of section 704 an amount received by way of dividend shall be treated as abnormal if the Board, the Special Commissioners or the tribunal, as the case may be, are satisfied— (a) in the case of a dividend at a fixed rate, that it substantially exceeds the amount which the recipient would have received if the dividend had accrued from day to day and he had been entitled only to so much of the dividend as accrued while he held the securities, so however that an amount shall not be treated as abnormal by virtue only of this paragraph if during the six months beginning with the purchase of the securities the recipient does not sell or otherwise dispose of, or acquire an option to sell, any of those securities or any securities similar to those securities; or (b) in any case, that it substantially exceeds a normal return on the consideration provided by the recipient for the relevant securities, that is to say, the securities in respect of which the dividend was received and, if those securities are derived from securities previously acquired by the recipient, the securities which were previously acquired.”
"Whenever you see the words ‘transaction in securities’ in this Chapter of the Statute you must treat them as being shorthand for the whole of the words in s. 467(1) that are preceded by the verb ‘includes’"