1. The Misuse of Drugs Regulations 2001. No. 3998. 2001. http://www.legislation.gov.uk/uksi/2001/3998/pdfs/uksi_20013998_en.pdf (accessed 26 Jan 2014).
2. The Misuse of Drugs (Amendment No 2) (England, Wales and Scotland) Regulations 2012. No. 973. 2012. http://www.legislation.gov.uk/uksi/2012/973/pdfs/uksi_20120973_en.pdf (accessed 26 Jan 2014).
3. The Medicines Order (Exemptions and Miscellaneous Amendments). No. 3062. 2009. http://www.legislation.gov.uk/uksi/2009/3062/article/3/made (accessed 26 Jan 2014).
4. Land Forced Standing Order. No 3359. 2010.
5. British Military use of morphine: a historical review;Gaunt;J R Army Med Corps,2009