Omar Usmani MB BS, PhD, FHEA, FRCP, FERS, is Professor of Respiratory Medicine at the National Heart and Lung Institute (NHLI), Imperial College London & Consultant Physician at the Royal Brompton Hospital (RBH) and St Mary's Hospital London. He is Clinical Director of ICRRU (Imperial College Respiratory Research Unit). He is an International Authority on Aerosol Science and Inhalation Medicine whose research has fundamentally contributed to the understanding of therapeutic aerosol deposition and clinical effectiveness in inhaled drug delivery to the lungs. In 2015, he was awarded one of the highest accolades in Aerosol Science, the Thomas T Mercer Award from the American Association of Aerosol Research (AAAR) and the International Society of Aerosols in Medicine (ISAM), recognising his International Research Excellence in Pharmaceutical Aerosols and Inhalable Materials. As Chair of the UK Inhaler Group (UKIG), working with Asthma UK, he oversaw the production of a series of validated videos on inhaler technique and he represents UKIG on the Medicines Optimisation Working Group, part of the Taskforce on Lung Health. He was Chair of the Guidelines Working Party that developed the Inhaler Choice Guideline for UK healthcare professionals in 2017, which was updated in 2020.