utual legal assistance in criminal matters is governed by numerous treaties and agreements, however the UK’s main domestic legislation outlining the relevant processes and provisions is the Crime (International Co-operation) Act (2003). Further guidance on mutual legal assistance in criminal matters is available on gov.uk: https://www.gov.uk/guidance/mutual-legal-assistance-mla-requests#requesting-mla-from-the-uk.   The UK Central Authority coordinates investigative assistance requests in criminal matters in England, Wales and Northern Ireland, excluding investigations relating solely to tax and fiscal customs matters. There are specific UK authorities who are designated to undertake certain actions in the mutual legal assistance process for criminal matters.