" If an ordinary action lies in respect of an alleged breach of duty, " it must follow, it seems to me, that in such an action the plaintiff " as well as claiming damages or an injunction as his remedy for the " breach of duty can claim any declaration necessary to establish that " there was a relevant breach of duty, and, in particular, a declaration " that a local authority's decision adverse to him under the Act was " not validly made."
" It would ... as a general rule be contrary to public policy and " as such an abuse of the process .of the court, to permit a person " seeking to establish that a decision of a public authority infringed " rights to which he was entitled to protection under public law to " proceed by way of an ordinary action and by this means to evade " the provisions of Order 53 for the protection of such authorities."