This executive summary compiles the main findings from the report "Opportunity Knocks: improving responses to labour exploitation with secure reporting". It explores the barriers documented and undocumented migrants face reporting workplace abuse and exploitation to the police and labour inspectors in the UK. It analyses how information about peoples’ immigration status becomes available to the Home Office following workers’ interaction with police and labour market enforcement agencies, providing practical recommendations for the introduction and strengthening of secure reporting systems to identify and prevent labour exploitation.