Judgment of the General Court (First Chamber, Extended Composition) of 10 April 2019.#Deutsche Post AG v European Commission.#State aid – Postal services – Financing of the additional labour and social costs relating to some of the staff of Deutsche Post by means of subsidies and revenue generated by the remuneration for price-regulated services – Decision to extend the formal investigation procedure – Decision establishing the existence of new aid on conclusion of the preliminary investigation stage – Action for annulment – Act open to challenge – Interest in bringing proceedings – Admissibility – Consequences of annulment of the final decision – Obligation to state reasons.#Case T-388/11.