Director/PDMR Shareholding

GW Pharmaceuticals PLC Director/PDMR Shareholding

GW Pharmaceuticals PLC

12 October 2011

GW Pharmaceuticals PLC

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

NOTIFICATION OF INTERESTS OF DIRECTORS AND CONNECTED PERSONS

Porton Down, UK, 12 October 2011: GW Pharmaceuticals (AIM: GWP) hereby provides notification that the Company has today been notified that, on 29th September Mr Richard Forrest, non-executive Director, purchased 10,000 ordinary shares of 0.1 pence each of the Company, representing less than 0.01% of the Company's issued share capital. This purchase took place at the market price of 95 pence per share.

Following this notification Mr Forrest's beneficial interest in the shares of GW Pharmaceuticals plc, has increased to 90,000 ordinary shares of 0.1 pence each, representing 0.07% of the Company's issued share capital.

The total number of shares outstanding in the Company is 133,055,154 ordinary shares of 0.1 pence each.

Enquiries:

GW Pharmaceuticals PLC Tel: +44 (0)1980 557 000

Adam George, Company Secretary

Peel Hunt LLP (Nominated Adviser) Tel: +44 (0)207 418 8900

James Steel/Vijay Barathan