Director/PDMR Shareholding

GW Pharmaceuticals PLC

("GW Pharmaceuticals" or the "Company")

NOTIFICATION OF INTERESTS OF DIRECTORS AND CONNECTED PERSONS

Porton Down, UK, 30 June 2011: GW Pharmaceuticals (AIM: GWP) hereby provides notification that the Company has today been notified of the following share transactions entered into by David Kirk, a Director of the Company.

On 29 June 2011, David Kirk exercised share options over 900,000 ordinary shares of 0.1 pence each with an exercise price of 104.5 pence per share. These options were 10 year options, granted in September 2001, which would have expired if not exercised before 10 September 2011. The resulting new ordinary shares, representing 0.68% of the Company's issued share capital, were immediately sold at a price of 118 pence per share.

Following these transactions, David Kirk continues to hold a beneficial interest in 59,500 GW Pharmaceuticals plc 0.1 pence ordinary shares, representing 0.04% of the Company's issued share capital.

The total number of shares outstanding in the Company is 132,935,692 ordinary shares of 0.1 pence each.

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