GW Pharmaceuticals to speak at the Piper Jaffray Health Care Conference

29 November 2010

Porton Down, UK; 29 November 2010: GW Pharmaceuticals plc (AIM: GWP) today announces that its Managing Director, Justin Gover will be speaking at the 22nd Annual Piper Jaffray Health Care Conference in New York on Tuesday, 30 November 2010 at 9.30am EST (2.30pm GMT). A live webcast will be accessible via the investor relations section of the GW website.

Enquiries:

GW Pharmaceuticals plc (Today) + 44 20 7831 3113
Dr Geoffrey Guy, Chairman (Thereafter) + 44 1980 557000
Justin Gover, Managing Director

Financial Dynamics + 44 20 7831 3113
Ben Atwell / John Dineen

Piper Jaffray Ltd +44 (0)20 3142 8700
Neil Mackison / Rupert Winckler

Note to Editors

About GW
GW was founded in 1998 and listed on the AIM, a market of the London Stock Exchange, in June 2001. Operating under license from the UK Home Office, the company researches and develops cannabinoid pharmaceutical products for patients who suffer from a range of serious ailments, in particular multiple sclerosis and cancer pain. GW has assembled a large in-house scientific team with expertise in cannabinoid science as well as experience in the development of both plant-based prescription pharmaceutical products and medicines containing controlled substances. GW occupies a world leading position in cannabinoids and has developed an extensive international network of the most prominent scientists in the field. For further information, please visit www.gwpharm.com