1. The National Archives (TNA): HO291–1509. Home Office: Prison population forecasts.
2. TNA: HO391–305. Annual Conference 1970: Statement on prison building programme.
3. TNA: HO391–375. Home Office: Joint Prison Building Steering Committee.
4. TNA: HO391–452. Prisons Board: Paper on future prison places and population; submission to Ministers.
5. TNA: HO391–457. Home Office: Prison building programme.