This Practice Note outlines the procedural aspects of submitting an immigration judicial review claim and available remedies. It discusses which type of claims should be submitted to the Upper Tribunal (Immigration and Asylum Chamber), and which to the Administrative Court of the High Court. It also covers the procedural aspects of submitting a claim in both jurisdictions, including the Pre-Action Protocol including letter before claim, commencing and lodging a claim, service and acknowledgement of service, consent orders, the permission application, and substantive hearing. Further permission to appeal following an unsuccessful claim is also covered.