2. Scheduled for bronchoscopy as part of clinical care or research protocol
3. No bleeding diathesis or therapeutic anticoagulation
4. COPD:
* FEV1/FVC ratio \<70% or
Asthma:
Diagnosed by standard clinical methods
Post-bronchodilator FEV1 ≥60% predicted or COVID-19 infection or previous COVID-19 infection (confirmed as per local guidelines)
You may not be if
1. Unable to provide informed consent
2. Exacerbation of obstructive airways disease or respiratory infection requiring systemic antibiotics or corticosteroids in the 6 weeks prior to enrolment unless suffering from COVID-19 infection and bronchoscopy is required for clinical reasons
3. Contra-indications to performing lung function testing
