1. Drug shortages cost NHS £38m in November
2. Harmful drug shortages will worsen after Brexit, doctors warn
3. HM Government. The human medicines (amendment) regulations 2019. http://www.legislation.gov.uk/uksi/2019/62/contents/made.
4. NHS England. Serious shortage protocols. https://www.england.nhs.uk/wp-content/uploads/2019/01/medicines-supply-update-letter.pdf.