Brussels and the European Union a provisional seat, though with the Common Assembly in Strasbourg as that was the only city with a large enough hemicycle (the one used by the Council of Europe). This agreement was temporary, and plans were set to relocate the institutions to Saarbrücken which would serve as a "European District", but this did not occur. The 1957 Treaties of Rome established two new communities, the European Economic Community (EEC) and the European Atomic Energy Community (Euratom). These shared the Assembly and Court of the ECSC but created two new sets of Councils and Commissions (equivalent to the ECSC's High Authority).
Economic history of the United Kingdom enter the European Economic Community (EEC) in order to revive its economy. This decision came after establishing a European Free Trade Association (EFTA) with other, non EEC countries since this provided little economic stimulus to Britain's economy. Levels of trade with the Commonwealth halved in the period 1945–1965 to around 25% while trade with the EEC had doubled during the same period. Charles de Gaulle vetoed a British attempt at membership in 1963 and again in 1967. The general election in June 1970 saw the Conservatives, now led by Edward Heath, achieve a surprise return to government after the opinion