Inclusion Criteria:  An ability to provide fully informed consent. A diagnosis of asthma or COPD. Male or female aged ≥18 and ≤ 80 years of age.  Exclusion Criteria:  Symptoms suggestive of COVID-19. An exacerbation of asthma or COPD or symptoms of a respiratory infection within the 30 days prior to the first visit. Any other clinically significant medical disease or uncontrolled concomitant disease, that is likely, in the opinion of the Investigator(s), to impact on the ability to participate in the study. The presence of any contraindications to spirometry.