Director/PDMR Shareholding

GW Pharmaceuticals PLC ("GW Pharmaceuticals" or the "Company")

SCHEDULE 11 

NOTIFICATION OF INTERESTS OF DIRECTORS AND CONNECTED PERSONS

Porton Down, UK, 25 March 2010: GW Pharmaceuticals (AIM: GWP) hereby provides notification that the Company has been notified that Dr Geoffrey Guy, a Director of the Company, has today transferred 35,000 ordinary shares of 0.1p each in the Company into his personal pension scheme. The transfer amounts to 0.03% of the issued ordinary share capital of the Company.

Following this notification Dr Guy's beneficial interest in 18,323,952 ordinary shares, amounting to 14.13% of the shares in issue, remains unchanged.

For further information, please contact:

GW Pharmaceuticals PLC +44 (0)1980 557 000

Adam George, Company Secretary

Piper Jaffray Ltd (Nominated Adviser)

Neil Mackison/Rupert Winckler +44 (0) 203 142 8700