If planning permission is to be refused, or if enforcement action is to be taken against unauthorised development, then the LPA must give reasons in writing which show "demonstrable harm to interests of acknowledged importance". Unpopularity is not grounds for refusal of planning permission. A proper reason for refusal of planning permission must be based on the tangible harm which would be brought about by the proposal, as reflected in a relevant policy or other matter relating to planning, and in order to protect the public interest. Similarly, if a condition is to be imposed on the grant of any planning permission, compliance with that condition should be essential to make acceptable a development which would otherwise be unacceptable (i.e. refused planning permission).