But when it comes to Mr Cameron’s claim that he has won “changes that are legally binding”, even he had to admit that they would require not only the agreement of all the other 27 member states (which already seems highly unlikely) but also “treaty change”. And the procedures for any further treaty changes, as also laid down in Lisbon, must now include a fully fledged “Convention”, an intergovernmental conference and ratification by the member states, all of which could not be achieved in less than four or five years.