Judicial review would imply a higher authority.

Judicial review is a process under which a government's executive, legislative, or administrative actions are subject to review by the judiciary.  In a judicial review, a court may invalidate laws, acts, or governmental actions that are incompatible with a higher authority.

For the most part, UK's highest legal authority is Parliament.

Parliamentary sovereignty is a principle of the UK constitution. It makes Parliament the supreme legal authority in the UK, which can create or end any law. Generally, the courts cannot overrule its legislation and no Parliament can pass laws that future Parliaments cannot change. Parliamentary sovereignty is the most important part of the UK constitution.