Judicial review subjects government actions to scrutiny under common law, ensuring that public bodies act within their legal bounds. It is not a check on Parliament but rather ensures that legislative and executive branches adhere to the law. Judicial reviews are conducted within the traditional court structure, primarily the High Court, and while potentially expensive, they are accessible to individuals and not limited to corporations. 

Key Point: Judicial review is a fundamental mechanism for holding public bodies accountable and ensuring legality in their actions. It plays a crucial role in maintaining the rule of law by providing a means to challenge administrative decisions and actions.