What steps she is taking to review the capability of (a) HM Prison Service and (b) contracted-out prisons to respond to incidents of concerted indiscipline.

All prisons, both private and public, face the same challenges to safety and security. We are continually reviewing and supporting prisons across the estate to mitigate and manage serious threats and incidents.

On how many occasions in the past year have private prisons required the support of the public Prison Service to deal with prison indiscipline?

Mutual assistance across both sectors is in place in the event of an incident to provide immediate support to those prisons in need. That means that private sector prisons can provide support to public sector prisons—and vice versa—in the event of a serious threat or incident.