In the framework of the research project "Pierre Werner and Europe", interview with Sir Brian Unwin, a diplomat in the British Foreign and Commonwealth Office from 1960 to 1968, a senior official in Her Majesty’s Treasury from 1968 to 1985, Chairman of the Board of Her Majesty’s Customs and Excise from 1987 to 1993 and President of the European Investment Bank from 1993 to 1999, carried out by the Centre Virtuel de la Connaissance sur l’Europe (CVCE) on 22 May 2015 at the home of Sir Brian Unwin in London. The interview was conducted by Dr Elena Danescu, a Researcher at the CVCE, and particularly focuses on the following subjects: his youth and education, his time at the Foreign and Commonwealth Office (1960–1968), the process of accession of the United Kingdom to the European Communities (1968–1975), the British rebate, the Fontainebleau Summit (1984), the Single European Act and Margaret Thatcher (1978–1987), his experience as Chairman of the Board of Her Majesty’s Customs and Excise (1987–1993), his time as President of the European Investment Bank (1993–1999), Pierre Werner and Luxembourg, and the prospects for the United Kingdom within the European Union. ; Pierre Werner and Europe