Martin Marshall is the Professor of Healthcare Improvement at UCL. He is also the lead for Improvement Science London, a new initiative to promote the science of improvement across the three London Academic Health Science Centres. Prior to his current role, he was the Clinical Director and Director of R&D at the Health Foundation. An expert in the field of quality improvement, Martin gives his views on important developments in England in the last 10 years and focusses on the role of using evidence in quality improvement.