University of Liverpool, 1992
Royal College of Physicians London, 1996
Royal Air Force & Civil Aviation Authority, 1997
Imperial College London, 2000
Imperial College London, 2001
Royal Aeronautical Society London, 2005
American College of Chest Physicians, 2007
Cardiff University Law School & Bond Solon Legal Training, 2009
Imperial College London, 2009
Royal College of Physicians London, 2009
Royal Aeronautical Society London, 2013