Adviser - Change of Name

GW Pharmaceuticals PLC ("GW Pharmaceuticals")

Adviser - Change of Name

GW Pharmaceuticals has been advised that, with effect from Monday 13th December 2010, its Nominated Adviser and Broker changed its name from Peel Hunt Limited to Peel Hunt LLP.

For further information, please contact:

GW Pharmaceuticals PLC +44 (0) 1980 557 000

Adam George, Company Secretary

Peel Hunt LLP (Nominated Adviser) +44 (0) 20 7418 8900

James Steel

Vijay Barathan