Director/PDMR Shareholding

GW Pharmaceuticals PLC Director/PDMR Shareholding

GW Pharmaceuticals PLC

8 June 2011

GW Pharmaceuticals PLC

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

NOTIFICATION OF INTERESTS OF DIRECTORS AND CONNECTED PERSONS

Porton Down, UK, 8 June 2011: GW Pharmaceuticals (AIM: GWP) hereby provides notification that the Company has today been notified that, on 6 June 2011, Dr Geoffrey Guy, a Director and Executive Chairman of the Company, gifted 79,450 ordinary shares of 0.1 pence each to a family member. This transfer represents 0.06% of the issued share capital and took place at the market price of 122.1 pence per share.

Following this notification Dr Guy retains a beneficial interest in 17,988,654 GW Pharmaceuticals plc ordinary shares of 0.1 pence each, representing 13.63% of the Company's current issued share capital.

The total number of shares outstanding in the Company is 131,964,592 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