Joined Cases T-226/09 and T-230/09: Judgment of the General Court of 16 September 2013 — British Telecommunications and BT Pension Scheme Trustees v Commission (State aid — Partial exemption from the obligation to contribute to the Pension Protection Fund — Decision declaring the aid incompatible with the internal market — Concept of State aid — State resources — Advantage — Selective nature — Adverse effect on competition — Effect on trade between Member States — Equal treatment — Proportionality — Legitimate expectations — Obligation to state reasons — Putting into effect of the aid)