Big Data for Complex Disease focuses on bringing together different types of information about patients to better understand opportunities to improve health care through the prediction, diagnosis, treatment or even prevention of complex disease. The work will initially focus on cancer and cardiovascular disease (CVD) the complex diseases responsible for the majority of disease and death in the UK and globally (CVD includes a range of disease such as heart attacks, strokes and Arrhythmia). This programme will use data from the whole UK population (60-65 million people), providing new tools and opportunities to understand how complex diseases effect each other and how peoples characteristics impact the chance of getting and outcomes of these diseases. This challenge will be an opportunity to bring experts in these different diseases types together and work as a team to improve patient care.