'Zero tolerance' is the NHS campaign against violence to NHS staff. Unions, employers and the Government support it.
All NHS trusts (the employers) are required to record all incidents directed against their staff, and to have clear strategies to protect their staff and reduce violent incidents.
The TUC handbook, Keeping well at work, includes examples of NHS policies to prevent violence and abuse against staff.
Just One More Click: Doggy drama about staying safe online at work.