Case C-520/10: Judgment of the Court (Third Chamber) of 3 May 2012 (reference for a preliminary ruling from the First-Tier Tribunal (Tax Chamber) — United Kingdom) — Lebara Ltd v Commissioners for Her Majesty’s Revenue and Customs (Taxation — Sixth VAT Directive — Article 2 — Supply of services for consideration — Telecommunications services — Prepaid phonecards displaying information for making international calls — Marketing through a network of distributors)