This timely research review explores the main issues surrounding competition and regulation in electricity markets. The industry is experiencing irresistible forces for change driven by energy policy objectives; a reassessment of market regulation in the face of high energy prices and the response to consumer pressure to agree on what constitutes a fair price for energy. This research review identifies the key articles that underpin the debate across the industries supply chain (generation, supply and networks) and from a regulatory perspective (including market power and incentive regulation) followed by a consideration of the overall impact of liberalisation and future developments.