CA 8 November 1989. Planning permissions were granted for a new farmhouse and `replacement bungalow` subject to conditions. Condition (f) imposed on the grant of permission for the replacement dwelling stated: `The existing farmhouse shall be demolished or used for ... agriculture other than a dwelling to the satisfaction of the planning authority and within one month of the beneficial use of the dwelling hereby approved.` Permitted development was carried out; a new farmhouse and the `replacement bungalow` were built. The `replacement bungalow` was occupied on 5 November 1977 and it followed from the wording of Condition (f) that by this date, the original `new bungalow` should either be demolished or used for agricultural purposes. Neither action was taken and it was common ground that there was a breach of Condition (f). The `new bungalow` remained empty until bought by H, who took up residence in 1984. Local authority served an enforcement notice specifying breach of Condition (f