Blocklisting Application

GW Pharmaceuticals PLC

BLOCK LISTING APPLICATION

29 November 2013

Porton Down, UK, 29 November 2013: GW Pharmaceuticals (AIM: GWP) hereby provides notification that application has today been made to the London Stock Exchange for admission to trading on AIM of three blocks of new ordinary shares of 0.1p each.

These new ordinary shares will be issued from time to time pursuant to the exercise of employee share options under the GW Pharmaceuticals share options schemes, as follows:

800,000 new ordinary shares for issue by the GW Pharmaceuticals Unapproved Share Option Scheme 2001.

200,000 new ordinary shares for issue by the GW Pharmaceuticals Approved Share Option Scheme 2001

300,000 new ordinary shares for issue by the GW Pharmaceuticals Long Term Incentive plan 2008.

On exercise the shares will be issued as fully paid and will rank pari passu in all respects with the Company's existing ordinary shares.

Admission is expected to be effective on 5 December 2013.

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