Porton Down, UK, 22 October 2008: GW Pharmaceuticals plc (AIM: GWP) will be announcing its preliminary financial results for the year to 30 September 2008 on Tuesday 18 November 2008.

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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 pain and other neurological symptoms. GW has assembled a team of over 100 scientists with extensive experience in developing 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 the Company’s website: www.gwpharm.com