The National Cyber Security Centre (NCSC) is committed to transparency and evidence-based interventions in its Active Cyber Defence (ACD) programme. In its latest publication, the NCSC reflects on its work and evaluates the effectiveness of its products and services. The ACD programme has adapted over the years to address evolving vulnerabilities and new cyber threats while maintaining its focus on sharing knowledge, mitigating vulnerabilities, and responding to breaches. Automation plays a crucial role in tackling these challenges efficiently, allowing the NCSC to generate scale and reach. Initially focused on enhancing cyber resilience in the public sector, the ACD programme has expanded to include all organizations, with initiatives like the Early Warning service and ‘Cheque Your Cyber Security’ initiative. Transparency is a fundamental principle of the ACD programme, as it fosters trust and enables the cybersecurity community to learn from the NCSC’s experiences. The evolving threat landscape requires ongoing adaptation and innovation, and collaboration with public and private sector entities is essential for success. By prioritizing transparency, evidence-based interventions, and automation, the NCSC aims to provide scalable solutions to counter cyber threats. The programme’s expansion beyond the public sector ensures that organizations of all types can benefit from its services. Collaboration and partnership are key to safeguarding against cyber attacks and creating a secure digital environment. The NCSC’s ACD programme demonstrates adaptability and dedication to cybersecurity, empowering organizations with varying levels of expertise. Through transparency and collaboration, the NCSC drives innovation and contributes to the overall resilience of the UK’s cybersecurity landscape.