Where a property is used for a purpose broader than that authorised by historic development consents, the fact that part of the actual use falls within the historic consent does not defeat a prosecution for the overall prohibited use. The characterisation of the purpose of use is a single task: the court must identify the appropriate designation of the purpose being served and then determine whether that purpose is the same as the use authorised by the historic consent. A consent for 'stables' does not authorise a 'horse transport business' even though stabling forms part of that business.
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