Case C-47/07 P: Judgment of the Court (Grand Chamber) of 16 December 2008 — Masdar (UK) Ltd v Commission of the European Communities (Appeal — Second paragraph of Article 288 EC — Action alleging unjust enrichment on the part of the Community — Community assistance programmes — Irregularities on the part of the co-contractor of the Commission — Services provided by a subcontractor — Non-payment — Risks inherent in economic activities — Principle of the protection of legitimate expectations — Duty of care of the Community administration)