 In "R v Inner London Education Authority, ex parte Westminster City Council", the London Education Authority used its powers to inform the public for the purpose of convincing the public of its political point of view.In all these cases, the authorities have based their decisions on considerations which were not relevant to their decision making power and acted unreasonably (this may also be qualified as having used their powers for an improper purpose).Note that the improper purpose or the irrelevant consideration must be such as to "materially influence" the decision.