Case C-182/19: Judgment of the Court (Seventh Chamber) of 26 March 2020 (request for a preliminary ruling from the First-tier Tribunal (Tax Chamber) — United Kingdom) — Pfizer Consumer Healthcare Ltd v Commissioners for Her Majesty’s Revenue and Customs (Reference for a preliminary ruling — Common Customs Tariff — Combined Nomenclature — Tariff classification — Heading 3005 and heading 3824 — Self-heating patches and belts to relieve pain — Implementing Regulation (EU) 2016/1140 — Invalidity)