Don Berwick, president and chief executive officer, Institute for Healthcare Improvement

Co-founder of the US Institute for Healthcare Improvement, Don Berwick’s influence stretches right across the pond - and around the globe - thanks to his inspirational approach to thought leadership and patient safety. An outspoken critic of his home nation’s health system, he has led an international mission to improve quality measurements and patient safety.

This has involved championing senior leadership and warning against creating a blame culture in health organisations - both issues that have striking resonance in the UK. Known to have had the ear of Number 10 in recent years, his position as a world guru on healthcare quality makes it likely the current administration will keep his phone number on speed-dial.

He juggles his IHI role with work as clinical professor of paediatrics and healthcare policy at Harvard Medical School, making him perhaps the ultimate clinical leader.