Claim: Every week in prisons there are 600 incidents of self-harm, at least one suicide, and 350 assaults, including 90 on staff.
Fact-check: Self-harm and suicides in jail - Full Fact
Verdict: correct, although suicides aren't measured precisely. 2015 was the worst year on record for these incidents.
Organisation: Full Fact
Author: Joseph O'Leary
Date published: 2016-02-08T00:00:00