The high bar to the principle of legality – Administrative Court Blog
‘In the recent case of R (Tasib) v Secretary of State for the Home Department [2026] EWHC 139 (Admin) (28 January 2026) the High Court (Farbey J) had an opportunity to consider the contours of the principle of legality in the context of immigration law. The claimant in this case is a Pakistani national who lived in the UK for over 25 years, until the Secretary of State made the decision to exclude him from the country in June 2025. As a result, he was prohibited from entering the UK. The claimant sought to challenge that decision before the High Court on six distinct grounds. This post focuses on just one of those grounds: that the scheme under which the exclusion decision was made was unlawful for being ultra vires the parent legislation which authorised it.’
Administrative Court Blog, 3rd February 2026

