“Even where particular words used in a statute appear at first to have an apparently clear and unambiguous meaning, it is always necessary to resolve differences of interpretation by setting the particular provision in its context as part of the relevant statutory framework, by having due regard to the historical context in which the relevant enactment came to be made, and to the extent that its purpose can be identified … to arrive at an interpretation which serves rather than frustrates its purpose”
“Where there has been an error of procedure such as a failure to comply with a rule or practice direction – (a) the error does not invalidate any step taken in the proceedings unless the court so orders; and (b) the court may make an order to remedy the error”