More than 100 prison officers are protesting outside HMP Birmingham over 'unprecedented levels of violence' in jails.
The Prison Officers Association (POA) called for all of its members across the country to protest 'until instructed otherwise'.
Staff walked out at 7am this morning in response to a report on Thursday which said there is potential for a 'complete breakdown' in order and discipline at HMP Bedford.
The union claims to have 20,000 members in England and Wales - 90 per cent of all prison staff - and it's thought around 150 officers are protesting outside HMP Birmingham.
The POA said: "The unprecedented levels of violence, and failure of this Government and employer to provide safe prisons has been headline news for some considerable time.
"The rise in violence against staff in prisons is laid firmly at the feet of Government and HMPPS (prisons and probation service), who have overseen the demise of the prison service over the last eight years."
- This is a breaking news story. We will update this with more information as we get it.