“distances shall be interpolated for intermediate angles”
“1. the expressions used in the authorities that the decision maker has failed to take into account a matter which is relevant, which is the formulation for instance in Forbes J judgment in Seddon Properties, or that he has failed to take into account matters which he ought to take into account, which is the way that Lord Greene put it in Wednesbury and Lord Denning in Ashbridge Investments, have the same meaning. 2. The decision maker ought to take into account a matter which might cause him to reach a different conclusion to that which he would reach if he did not take it into account. Such a matter is relevant to his decision making process. By the verb “might”, I mean where there is a real possibility that he would reach a different conclusion if he did take that consideration into account. 3. If a matter is trivial or small in importance in relation to the particular decision, then it follows that if it were taken into account there would be a real possibility that it would make no difference to the decision and that it is not a matter which the decision maker ought to take into account. 4. As Hodgson J said, there is clearly a distinction between matters which a decision maker is obliged by statute to take into account and those where the obligation to take into account is to be implied from the nature of the decision and the matter in question. I refer back to the “Creed N.Z.” case. 5. If the validity of the decision is challenged on the ground that the decision maker failed to take into account a matter in the second category, it is for the judge to decide whether it was a matter which the decision maker should have taken into account. 6. If the judge concludes that the matter was “fundamental to the decision” or that it is clear that there is the real possibility that the consideration of the matter would have made a difference to the decision, he is thus enabled to hold the decision was not validly made. But if the judge is uncertain whether the matter would have had this effect or was of such importance in the decision making process, then he does not have before him the material necessary for him to conclude that the decision was invalid. 7. (Though this does not arise in the circumstances of this case). Even if the judge has concluded that he could hold that the decision is invalid, in exceptional circumstances he is entitled nevertheless, in the exercise of his discretion, not to grant any relief”