Case C-709/20: Judgment of the Court (Grand Chamber) of 15 July 2021 (request for a preliminary ruling from the Appeal Tribunal (Northern Ireland) — United Kingdom) — CG v The Department for Communities in Northern Ireland (Reference for a preliminary ruling — Citizenship of the Union — National of a Member State without an activity residing in the territory of another Member State on the basis of national law — The first paragraph of Article 18 TFEU — Non-discrimination based on nationality — Directive 2004/38/EC — Article 7 — Conditions for obtaining a right of residence for more than three months — Article 24 — Social assistance — Concept — Equal treatment — Agreement on the withdrawal of the United Kingdom of Great Britain and Northern Ireland — Transition period — National provision excluding Union citizens with a right of residence for a fixed period under national law from social assistance — Charter of Fundamental Rights of the European Union — Articles 1, 7 and 24)