After a detailed investigation, the European Commission (Commission) announced in June 2007 that the proposed merger between Ryanair and Aer Lingus was incompatible with the common market. Despite Ryanair’s offer of commitments, the Commission concluded that the effect of the merger would make it prohibitive for new entrants to enter the market, and could potentially result in a monopoly on various air routes. On 10 November 2007, Ryanair lodged an appeal with the Court of First Instance (CFI) seeking annulment of the Commission’s decision on the basis that the Commission failed to demonstrate to the necessary standard that the proposed merger would significantly impede competition. Ryanair also submits that the Commission failed to demonstrate that the commitments given would not alleviate the competition concerns and that manifest errors were made in the assessment of the competitive relationship between the parties, the barriers to entry and expansion and the route-to-route analysis.