Case C-675/20 P: Judgment of the Court (Fourth Chamber) of 15 September 2022 — Colin Brown v European Commission, Council of the European Union (Appeal — Civil service — Annex VII to the Staff Regulations of Officials of the European Union — Article 4(1)(a) and (b) — EU official who is a national of the United Kingdom of Great Britain and Northern Ireland and who during the 10 years before his entry into service habitually resided within the territory of the State in which he is employed — Withdrawal of the United Kingdom from the European Union — Acquisition by that EU official of the nationality of the State in which he is employed — Withdrawal of the entitlement to receive an expatriation allowance — Action for annulment)