The Government Says

Guidance: Prison health and safety arrangements for risk assessment: PSI 37/2015

Guidance: Prison health and safety arrangements for risk assessment: PSI 37/2015
Local copy of psi-37-2015-hs-arrangements-for-risk-assessment_-_aka_AI_26-2015.pdf
Local copy of psi-06-2015-pi-03-2015-national-hs-policy-july-2025.pdf

https://www.gov.uk/government/publications/prison-health-and-safety-arrangements-for-risk-assessment-psi-372015

seen at 16:47, 13 July in Ministry of Justice - Activity on GOV.UK.