Case C-57/19 P: Judgment of the Court (Fourth Chamber) of 2 September 2021 — European Commission v Tempus Energy Ltd, Tempus Energy Technology Ltd, United Kingdom of Great Britain and Northern Ireland (Appeal — State aid — Aid scheme — Article 108(2) and (3) TFEU — Regulation (EC) No 659/1999 — Article 4(3) and (4) — Concept of ‘doubts as to the compatibility of a notified measure with the common market’ — Decision not to raise objections — Formal investigation procedure not initiated — Guidelines on State aid for environmental protection and energy 2014-2020 — Code of Best Practice for the conduct of State aid control procedures — ‘Pre-notification’ contacts — Procedural rights of interested parties — Electricity capacity market in the United Kingdom)