Who is investigating? In the modern world, with its globalised markets, transnational corporations and businesses, and international money flows, it is very common for multiple authorities or agencies, across multiple jurisdictions, to investigate the same conduct. Many jurisdictions, such as the UK and the US, have anti-bribery and corruption provisions with extensive extra-territorial reach. In addition, some national enforcement agencies are willing to co-operate and share intelligence when tackling cross-border bribery and corruption. At the outset of an investigation, consideration should be given to which agencies are known to be involved, or might become involved in the future. Government agencies can and do conduct parallel and/or co-ordinated investigations with each other, within and across jurisdictions. Individuals and corporates under investigation may well find themselves facing engagement with enforcement agencies on several fronts simultaneously (sometimes within the same jurisdiction), and due care and consideration must be given to how each engagement impacts one another. Mutual Legal Assistance (MLA) treaties and Memoranda of Understanding provide US and UK enforcement agencies with