It can be on the basis of an anonymous complaint, though a judge will need to be satisfied of its substantiality. There are individuals who simply would not seek an injunction if they thought that they could be clearly identified as the source of the procedure. Of course, judges are used to weighing up hearsay
evidence, which has less weight than direct evidence. A judge is unlikely to make an order if they think that it is double-hearsay or comes from an unreliable source.
Before making an order, a judge also has to decide that it is proportionate and necessary, in accordance with the Human Rights Act. As I submitted, it is no light thing for the agencies to assemble the evidence necessary to satisfy a judge. The Law Society has carefully considered the arguments against Clause 1. Although more than happy to criticise government legislation—and even this Bill, in some respects—it remains absolutely firm in its support of the existence of the power described in Clause 1, fearing otherwise that the hurdle would be too high and that the power to prevent anti-social behaviour would be damaged.