“[34] Both Mawson and SPI [ IRC v Scottish Provident Institution[2004] UKHL 52 ] emphasise the need to interpret the statute in question purposively, unless it is clear that is not intended by Parliament. The court has to apply that interpretation to the actual transaction in issue, evaluated as a commercial unity, and not be distracted by any peripheral steps inserted by the actors that are in fact irrelevant to the way the scheme was intended to operate. SPI also illustrates another important point, namely that the fact that a real commercial possibility has been injected into a transaction does not mean that it can never be ignored. It can be disregarded if the parties have proceeded on the basis that it should be disregarded.” “[44] .... In my judgment, applying a purposive interpretation involves two distinct steps: first, identifying the purpose of the relevant provision. In doing this, the court should assume that the provision had some purpose and Parliament did not legislate without a purpose. But the purpose must be discernible from the statute: the court must not infer one without a proper foundation for doing so. The second stage is to consider whether the transaction against the actual facts which occurred fulfils the statutory conditions. This does not, as I see it, entitle the court to treat any transaction as having some nature which in law it did not have but it does entitle the court to assess it by reference to reality and not simply to its form.”