Case C-247/20: Judgment of the Court (Fifth Chamber) of 10 March 2022 (request for a preliminary ruling from the Social Security Appeal Tribunal (Northern Ireland) — United Kingdom) — VI v The Commissioners for Her Majesty’s Revenue & Customs (Reference for a preliminary ruling — Right to move and reside freely within the territory of the Member States — Article 21 TFEU — Directive 2004/38/EC — Article 7(1)(b) and Article 16 — Child who is a national of a Member State staying in another Member State — Right of residence derived from the parent who is the primary carer of that child — Requirement of comprehensive sickness insurance cover — Child having a permanent right of residence for part of the periods concerned)