GW Pharmaceuticals to present at the 5th Annual Piper Jaffray Europe Healthcare Conference

22 June 2010

Porton Down, UK, 22 June 2010: GW Pharmaceuticals plc (AIM: GWP) announces that its Managing Director, Justin Gover will be presenting at the 5th Annual Piper Jaffray Europe Healthcare Conference in London on Wednesday, 23 June 2010 at 12 pm BST.

Investors may access a live webcast of the presentation at www.gwpharm.com on the presentations page under the Investor Relations tab. An archived version of the presentation will be available later that day.

-ends-

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 Pharmaceuticals
GW Pharmaceuticals plc (AIM:GWP) was founded in 1998 and is listed on the AiM, a market of the London Stock Exchange. Operating under licence 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 MS 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