He is a part-time Advisor to the Office of Fair Trading (on the Stock 'Big Bang' Exchange case), and a part-time Member of the Monopolies and Mergers Commission. He has been an Academic Advisor and subsequently a part-time Member of the Accounting Standards Board (UK), and he is a full-time Member of the International Accounting Standards Board. He has acted as a consultant to leading national and international companies on competition policy, accounting and pricing issues.