Measurement of spirometry, that: (a) involves a permanently recorded tracing, performed before and after inhalation of a bronchodilator; and (b) is performed to: (i) confirm diagnosis of chronic obstructive pulmonary disease (COPD); or (ii) assess acute exacerbations of asthma; or (iii) monitor asthma and COPD; or (iv) assess other causes of obstructive lung disease or the presence of restrictive lung disease; each occasion at which recordings are made