that the authority would keep the facility open, and quashed the authority's decision to close it. The Court stated that there were three categories of legitimate expectations: Category (a): substantive legitimate expectation – change of policy. A court may decide that a public authority is only required "to bear in mind its previous policy or other representation, giving it the weight it thinks right, but no more, before deciding whether to change course". In this type of case, which involves a change of policy by the authority, the court can only review the decision on the grounds of Wednesbury unreasonableness. In other words, it will determine if the decision was rational and whether the authority gave proper weight to the implications of not fulfilling the promise. In ex parte Begbie it was clarified that cases fall into this category where a sizeable part of the population is affected and the change of policy involves "what may inelegantly be called the macro-political field". Category (b): procedural legitimate expectation – no consultation. The court may decide that a promise or practice creates a legitimate expectation of being consulted before a certain decision is taken. In this situation, "it is uncontentious that the court itself will require the opportunity for consultation to be given unless there is an overriding reason to resile from it[] ... in which case the court will itself judge the adequacy of the reason advanced for the change of policy, taking into account what fairness requires". Category (c): substantive legitimate expectation – promise having the character of a contract. If a lawful promise or practice has "induced a legitimate expectation of a benefit which is substantive, not simply procedural", the court will decide "whether to frustrate that expectation is so unfair that to take a new and different course will amount to an abuse of power". When the expectation is established to be legitimate, "the court will have the task of weighing the requirements of fairness against any overriding interest relied upon for the change of policy". Most cases of this type are likely to be "cases where the expectation is confined to one person or a few people, giving the promise or representation the character of a contract". Proportionality approach Under the categorical approach advocated by ex parte Coughlan, for a substantive legitimate expectation to be protected it had to fit into either category (a) or (c). However,