At Lindholme, on Monday, 25 prisoners refused to return to their cells and barricaded themselves in, starting small fires and damaging fixtures and fittings. The stand-off, classed by the prison service as "indiscipline", ended eight hours later when they surrendered. Last week at Guys Marsh, 30 inmates refused to go back to their cells. They barricaded themselves in and damaged fixtures and fittings. One prison officer needed hospital treatment for bruising.