Director/PDMR Shareholding

GW Pharmaceuticals PLC Director/PDMR Shareholding

GW Pharmaceuticals PLC

5 December 2011

GW Pharmaceuticals PLC

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

NOTIFICATION OF INTERESTS OF DIRECTORS AND CONNECTED PERSONS

Porton Down, UK, 5 December 2011: GW Pharmaceuticals (AIM: GWP) hereby provides notification that the Company has today been notified that, on 22nd November Dr Geoffrey Guy, a Director and Executive Chairman of the Company, transferred 9,500 ordinary shares of 0.1 pence each into his personal pension scheme.

This transaction, representing less than 0.01% of the Company's issued share capital, took place when the market price was 101 pence per share.

Following this notification Dr Guy's beneficial interest in 17,552,654 GW Pharmaceuticals plc ordinary shares of 0.1 pence each, representing 13.2% of the Company's current issued share capital, remains unchanged.

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