Case C-695/20, Fenix International: Judgment of the Court (Grand Chamber) of 28 February 2023 (request for a preliminary ruling from the First-tier Tribunal (Tax Chamber) — United Kingdom) — Fenix International Ltd v Commissioners for Her Majesty’s Revenue and Customs (Reference for a preliminary ruling — Implementing power of the Council of the European Union — Article 291(2) TFEU — Common system of value added tax (VAT) — Directive 2006/112/EC — Articles 28 and 397 — Taxable person, acting in his or her own name but on behalf of another person — Provider of services by electronic means — Implementing Regulation (EU) No 282/2011 — Article 9a — Presumption — Validity)