Quoting Attfield v. London Borough of Barnet (2013), which established that a council must not use parking charges as a means to generate revenue for unrelated purposes. The court ruled that councils must only impose charges that are necessary for covering the costs of operating the parking scheme.
The Road Traffic Regulation Act 1984, specifically Section 122, which mandates that traffic regulations, including CPZs, must be implemented to secure the expeditious, safe, and convenient movement of traffic and NOT for revenue generation.