(A leading case on school admissions, Section 411 Education Act 1996, conduct of appeals, whether Appeal Committees can take into account anterior unlawfulness of policy) (windsorchambers.com)
Instead they are inbuilt into the tests for unlawfulness and depend on the error alleged. (administrativelawmatters.com)
And the separation of judicial power guards against unlawfulness in the exercise of legislative and executive power. (humanrights.gov.au)