“The approach to section 187B 38. …It seems to me perfectly clear that the judge on a section 187B application is not required, nor even entitled, to reach his own independent view of the planning merits of the case. These he is required to take as decided within the planning process, the actual or anticipated breach of planning control being a given when he comes to exercise his discretion. But it seems to me no less plain that the judge should not grant injunctive relief unless he would be prepared if necessary to contemplate committing the defendant to prison for breach of the order, and that he would not be of this mind unless he had considered for himself all questions of hardship for the defendant and his family if required to move, necessarily including, therefore, the availability of suitable alternative sites…Questions of the family's health and education will inevitably be of relevance. But so too, of course, will countervailing considerations such as the need to enforce planning control in the general interest and, importantly therefore, the planning history of the site. The degree and flagrancy of the postulated breach of planning control may well prove critical. If conventional enforcement measures have failed over a prolonged period of time to remedy the breach, then the court would obviously be the readier to use its own, more coercive powers. Conversely, however, the court might well be reluctant to use its powers in a case where enforcement action had never been taken. On the other hand, there might be some urgency in the situation sufficient to justify the pre-emptive avoidance of an anticipated breach of planning control. Considerations of health and safety might arise. Preventing a gipsy moving onto the site might, indeed, involve him in less hardship than moving him out after a long period of occupation. Previous planning decisions will always be relevant; how relevant, however, will inevitably depend on a variety of matters, including not least how recent they are, the extent to which considerations of hardship and availability of alternative sites were taken into account, the strength of the conclusions reached on site use and environmental issues, and whether the defendant had and properly took the opportunity to make his case for at least a temporary personal planning permission”