The Committee of European Banking Supervisors (CEBS) and three European Banking Associations (the European Association of Co-operative Banks, European Banking Federation, and the European Savings Banks Group) jointly organised a workshop on the principle of proportionality on 11 January 2007 in London. The objective of the event was to bring together banking supervisors and industry representatives to have an open and informal exchange of views on the application of the principle of proportionality.