This publication contains explanatory notes to the Energy Act 2004 (chapter 20, ISBN 0105420042). The Act is in four parts with 23 schedules and includes provisions covering three main areas: i) the civil nuclear industry; ii) sustainability and renewable energy sources; and iii) energy markets and regulation. The Act will create a single wholesale electricity market for Britain, called the British Electricity Trading and Transmission Arrangements (BETTA). The provisions covering electricity and gas interconnectors implement a number of requirements in the EU's 2003 Gas and Electricity Directives and its Electricity Regulation.