1. Public Health England. United Kingdom drug situation 2019: Focal Point annual report [Internet]. 2021 [cited 2022 Nov 24]. Available from: https://www.gov.uk/government/publications/united-kingdom-drug-situation-focal-point-annual-report/united-kingdom-drug-situation-focal-point-annual-report-2019
2. European Monitoring Centre for Drugs and Drug Addiction (EMCDDA). Drug-related deaths and mortality in Europe [Internet]. 2019 [cited 2022 Nov 24]. Available from: https://www.emcdda.europa.eu/system/files/publications/11485/20193286_TD0319444ENN_PDF.pdf
3. Office for National Statistics (ONS). Deaths related to drug poisoning in England and Wales: 2020 registrations [Internet]. 2020 2021 [cited 2022 Nov 24]. Available from: https://www.ons.gov.uk/peoplepopulationandcommunity/birthsdeathsandmarriages/deaths/bulletins/deathsrelatedtodrugpoisoninginenglandandwales/2020
4. Drug-related deaths: practical responses to a growing problem;Parsons G;Prescriber. 2019 Dec
5. National Crime Agency. National strategic assessment of serious and organised crime 2020 [Internet]. 2020 2019 [cited 2022 Nov 24]. Available from: https://nationalcrimeagency.gov.uk/who-we-are/publications/437-national-strategic-assessment-of-serious-and-organised-crime-2020/file