1. British Lung Foundation . Chronic obstructive pulmonary disease (COPD) statistics, 2019. Available: http://statistics.blf.org.uk/copd
2. National Health Service . Copd commissioning toolkit: a resource for commissioners, 2012. Available: https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/212876/chronic-obstructive-pulmonary-disease-COPDcommissioning-toolkit.pdf [Accessed 02 Aug 2019].
3. Health and Safety Executive . Work-Related chronic obstructive pulmonary disease in Great Britain, 2018. Available: http://www.hse.gov.uk/statistics/causdis/copd.pdf
4. S32 Epidemiology of chronic obstructive pulmonary disease (COPD) in the uk: findings from the british lung foundation’s ‘respiratory health of the nation’ project
5. Department of Health . Facts about COPD, 2010. Available: https://webarchive.nationalarchives.gov.uk/ukgwa/+/www.dh.gov.uk/en/Healthcare/Longtermconditions/COPD/DH_113006 [Accessed Aug 2019].