Judgment of the Court (First Chamber) of 6 October 2021.#Scandlines Danmark ApS and Scandlines Deutschland v European Commission.#Appeal – Action for annulment – State aid – Public financing of the Fehmarn Belt fixed rail-road link – Individual aid – Notified aid declared compatible with the internal market – Execution of an important project of common European interest – Decision not to raise any objections – Monopoly – Distortion of competition and effect on trade.#Joined Cases C-174/19 P and C-175/19 P.