John D Holmes is Principal Economist for Which?, the UK’s Consumer Association, providing economic advice on a range of consumer market and competition issues that concern UK consumers. Recent work has included a review of hidden charging practices, merger cases in the energy, telecommunications and event ticketing markets and campaigning work on energy, housing and banking. John represents Which? at a number of forum, including the competition sub-group of the European Consumer Consultative Group, the Competition Law Forum and has assisted the Internal Competition Network as a peer reviewer. Originally John trained as a development economist, qualifying with a Masters from Nottingham University, and before joining Which? worked for the UK’s energy regulator (Ofgem) and the Office of Fair Trading enforcing anti-trust law.