Following the referendum on membership of the EU, this article assesses the ideological legacy of David Cameron on Conservative politics in Britain. It focuses on three areas of ideological tension in contemporary conservatism, namely European integration, the divide between social liberals and traditionalists, and the future of the Union post-Brexit. Applying the concept of heresthetics to offer a theoretically informed account, it argues that while Cameron enjoyed ' benefits, his desire to modernize conservatism was ultimately undone by his failure to restructure the key U leading to his downfall.