Hannah Deacon's son Alfie Dingley was the first person to receive an NHS prescription for medical cannabis. Sadly other children with severe epilepsy have not been so lucky. Hannah has written to Boris Johnson urging him to "stop the suffering of children" whose desperate families are left either raising money for expensive private prescriptions, or having to buy cannabis on the black market. Hear her inspiring story of how cannabis saved her son's life. To urge your local MP to take action, please go to the Change.org campaign with 650,000 signatures and counting.