Electro-Convulsive Therapy (Prison Hospitals) Mr. Kilroy-Silk asked the Secretary of State for the Home Department how many prisoners have received electro-convulsive therapy in the last year for which figures are available. Mr. John The process of analysis and collation of medical statistics for 1976 is not yet complete, but a provisional view indicates a figure of about 35. Mr. Kilroy-Silk asked the Secretary of State for the Home Department how many prisoners are currently undergoing electro-convulsive therapy. Mr. John I regret that this information could only be obtained at disproportionate cost.