The Supreme Court has upheld the barring order on HMRC originally imposed by the First-tier Tribunal in BPP University College of Professional Studies v HMRC. The decision represents the first time that the Supreme Court has considered the approach to be taken by the tax tribunals to sanctions for non-compliance with procedural directions, and its observations as to the standards of behaviour to be expected of HMRC as a public law litigant are notable. In upholding the barring order imposed by the FTT, the Supreme Court has confirmed that appellant taxpayers are entitled to full particulars of the cases that they will have to meet in order to make good their appeals. In doing so, the court has also clarified that HMRC as a public body is expected to comply with at least the same standards of behaviour as private litigants.