Britain had far greater influence in Brussels since 1973 than has been recognised. For decades the UK was a driving and liberalising force when it came to the Single Market, enlargement, competition and trade, as well as foreign policy. Jonathan Faull (Kings College London), Piers Ludlow (LSE), and Laurent Warlouzet (Université du Littoral Côte d'Opale) outline the story of this significant and widespread British sway over the EU