Parties intervenantes au soutien de la partie défenderesse: Royaume-Uni de Grande-Bretagne et d’Irlande du Nord (représentants: initialement S. Behzadi-Spencer, agent, puis I. Rao, agent, assisté de D. Beard, barrister); et Commission européenne (représentants: A. Bordes, P. Aalto et S. Boelaert, agents)
Interveners in support of the defendant: United Kingdom of Great Britain and Northern Ireland (represented initially by S. Behzadi-Spencer, acting as Agent, and subsequently by I. Rao, acting as Agent, and by D. Beard, Barrister); and European Commission (represented by: A. Bordes, P. Aalto and S. Boelaert, Agents)