Director/PDMR Shareholding

GW Pharmaceuticals PLC Director/PDMR Shareholding

4 December 2012

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

NOTIFICATION OF INTERESTS OF DIRECTORS AND CONNECTED PERSONS

Porton Down, UK, 4 December 2012: GW Pharmaceuticals (AIM: GWP) hereby provides notification that on 3rd December Chris Tovey, Chief Operations Officer of the Company, purchased 5,000 0.1 pence ordinary shares of GW Pharmaceuticals plc at a purchase price of 63.5 pence per share.

Following this notification Mr Tovey has a total beneficial interest in 5,000 GW Pharmaceuticals plc ordinary shares of 0.1 pence each, representing less than 0.1% of the Company's current issued share capital.

The total number of shares outstanding in the Company is 133,370,354 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