- Mark ElliottMark ElliottProfessor of Public Law, University of Cambridge
- and Jason VaruhasJason VaruhasAssociate Professor, University of Melbourne
This chapter examines grounds of judicial review that are substantive in two senses: it reduces the range of substantive options open to a decision-maker, or it involves judicial examination of the quality of the reasons for the decision itself, rather than the quality of the process adopted by the decision-maker. The chapter first considers the doctrine of reasonableness or rationality in administrative law before discussing the doctrine of proportionality and the notion of judicial deference in relation to variable intensity review. It also explores the role of the proportionality test in English law and the question of whether English courts are heading towards jettisoning the reasonableness doctrine in favour of utilizing proportionality in all relevant cases.