It is a matter for the Prisons and Probation Ombudsman to determine his staff. Staff have been recruited from a wide variety of employment backgrounds, including some having previously worked for HM Prison Service and the probation service. It is right that the office has a good mix of experience across its cadre of investigators in particular, including having operational knowledge of the organisations which can be subject to investigations. This mix is kept under review. Detailed information on the precise numbers of staff, full or part time, who have been employed by the prisons and probation ombudsman and previously employed by HM Prison Service is not held centrally and could be obtained only at disproportionate cost.