Case C-728/23 P: Judgment of the Court (First Chamber) of 12 March 2026 – Kingdom of Spain v Robert Stockdale, Council of the European Union, European Commission, European External Action Service, EU Special Representative in Bosnia and Herzegovina (Appeal – Staff coming under the Common Foreign and Security Policy (CFSP) – International contract staff member hired by the European Union Special Representative in Bosnia and Herzegovina – Successive fixed-term employment contracts – Termination of the employment contract following the withdrawal of the United Kingdom of Great Britain and Northern Ireland from the European Union – Appeal brought by a Member State which did not intervene in the proceedings before the General Court – Third paragraph of Article 56 of the Statute of the Court of Justice of the European Union – Admissibility of the appeal – Concept of disputes between the Union and its servants – Cross-appeal