 So for example, a tenant of the public authority could allege illegality of its decision to raise the rents when the authority sued him for failing to pay under the tenancy contracts.He was not required to commence a separate judicial review process ("Wandsworth London Borough Council v Winder" (1985)).If an issue is a mix of private law rights, such as the right to get paid under a contract, and public law issues of the competence of the public authority to take the impugned decision, the courts are also inclined to allow the claimant to proceed using ordinary civil procedure, at least where it can be demonstrated that the public interest of protecting authorities against frivolous or late claims has not been breached ("Roy v Kensington and Chelsea and Westminster Family Practitioner Committee" (1992), "Trustees of the Dennis Rye Pension Fund v Sheffield City Council" (1997)).