The most accomplished British diplomat of his generation, Sir Peter Westmacott was a widely respected and hugely effective Ambassador of the U.K. across the United States, and previously in France and Turkey. He was directly instrumental in ensuring that the 2015 Iran nuclear deal was not voted down by Congress and in getting accession negotiations for Turkey's membership of the EU started a decade earlier. He was closely involved with the promotion of trade and investment and engaged in a number of high-profile corporate regulatory issues. His understanding of the U.S. political scene, and range of contacts within the Administration, on Capitol Hill, and amongst Governors, is second to none. As Ambassador, he spoke frequently to businesses, think tanks, World Affairs Councils, members of Congress and universities, and at events he hosted at the Ambassador’s Residence. He appeared regularly on TV and radio.