The U.K. will do “whatever we have to do” to boost its competitiveness if it fails to secure post-Brexit access to the European Union single market, Chancellor of the Exchequer Philip Hammond said in an interview published Sunday in a German newspaper. “If Britain were to leave the European Union without an agreement on market access, then we could suffer from economic damage at least in the short-term,” Hammond said in an interview with Welt am Sonntag.