Mandatory Credit: Photo by LNP/REX Shutterstock (4892912b) Vivienne Westwood Artists Against TTIP photocall, London, Britain - 02 Jul 2015 Vivienne Westwood at an artists against Transatlantic Trade and Partnership (TTIP) photocall at the New Vic Theatre in London. The TTIP is a free trade and investment treaty currently being negotiated between the European Union and the USA.