In the wake of the Cambridge Analytica scandal, people are worried about big data. But digital technology and its application to “big data” has the capacity to transform the future of healthcare. So how do we use the power of big data while preserving the rights of the individual citizen? In this public forum, representatives from academia, the NHS, Government, industry, charities and patient groups explain how to restore public trust so that the knowledge gained through this data can bring benefits to patients and society. The Forum will also highlight the challenges and barriers that must be overcome before the transformative potential of using health data can be fully realised.