“It is one thing to give a statute a purposive construction. It is another to rectify the terms of highly prescriptive legislation in order to include provisions which might have been included but are not actually there”: See Mayes v HMRC[2010] STC 1 (§ 30)). vii) In looking at particular words that Parliament uses what the interpreter is looking for is the relevant fiscal concept: ( MacNiven v Westmoreland Investments Ltd[2001] STC 237 (§§ 48, 49)). viii) Although one cannot classify all concepts a priori as “commercial” or “legal”, it is not an unreasonable generalisation to say that if Parliament refers to some commercial concept such as a gain or loss it is likely to mean a real gain or a real loss rather than one that is illusory in the sense of not changing the overall economic position of the parties to a transaction: WT Ramsay Ltd v Commissioners of Inland Revenue (1981) 54 TC 101 , 187; Inland Revenue Commissioners v Burmah Oil Co Ltd (1981) 54 TC 200 , 221; Ensign Tankers Ltd v Stokes[1992] 1 AC 655 , 673, 676, 683; MacNiven v Westmoreland Investments Ltd (§§ 5, 32); Barclays Mercantile Business Finance Ltd v Mawson (§ 38). ix) A provision granting relief from tax is generally (though not universally) to be taken to refer to transactions undertaken for a commercial purpose and not solely for the purpose of complying with the statutory requirements of tax relief: ( Collector of Stamp Revenue v. Arrowtown Assets Ltd (§ 149)). However, even if a transaction is carried out in order to avoid tax it may still be one that answers the statutory description: (Barclays Mercantile Business Finance Ltd v Mawson (§ 37). In other words, tax avoidance schemes sometimes work. x) In approaching the factual question whether the transaction in question answers the statutory description the facts must be viewed realistically. ( Barclays Mercantile Business Finance Ltd v Mawson (§ 36). xi) A realistic view of the facts includes looking at the overall effect of a composite transaction, rather than considering each step individually: (WT Ramsay Ltd v Commissioners of Inland Revenue (1981) 54 TC 101 , 185; Carreras Group Ltd v Stamp Commissioner[2004] STC 1377 (§ 8); Barclays Mercantile Business Finance Ltd v Mawson (§ 35). xii) A series of transactions may be viewed as a composite transaction where the series of transactions is expected to be carried through as a whole, either because there is an obligation to do so, or because there is an expectation that they will be carried through as a whole and no likelihood in practice that they will not: ( WT Ramsay Ltd v Commissioners of Inland Revenue (1981) 54 TC 101 , 185). xiii) In considering the facts the fact finding tribunal should not be distracted by any peripheral steps inserted by the actors that are in fact irrelevant to the way in which the scheme was intended to operate: ( Astall v HMRC (§ 34)). xiv) In considering whether there is no practical likelihood that the whole series of transactions will be carried out, it is legitimate to ignore commercially irrelevant contingencies and to consider it without regard to the possibility that, contrary to the intention and expectation of the parties it might not work as planned: (Commissioners of Inland Revenue v Scottish Provident Institution (2004) 76 TC 538 , 558 § 23). Even if the contingency is a real commercial possibility it may be disregarded if the parties proceeded on the basis that it should be disregarded: ( Astall v HMRC (§ 34)).”