1990 Strangeways Prison riot April, HM Prison Durham, HM Prison Winchester and HM Prison Wandsworth on 4 April, and HM Young Offenders Institute Glen Parva on 6 April. The weekend of 7 April and 8 April saw protests across the prison system. At HM Prison Leeds there was a sit-down protest after the arrival of over 100 prisoners who had been transferred from Strangeways. At HM Prison Dartmoor, between 100 and 120 prisoners wrecked D wing of the prison, and 12 prisoners also protested on the roof of C wing unfurling a banner that read "Strangeways, we are with you". 32 prisoners from Dartmoor
Attica Prison riot officers and four inmates killed being attributed to the prisoners. "New York Times" writer Fred Ferretti said the rebellion concluded in "mass deaths that four days of taut negotiations had sought to avert". As a result of the riot, a number of changes were made in the New York prison system to satisfy some of the prisoners' demands, reduce tension in the system, and prevent future such rebellions. As of 2018, there has never been another riot of anywhere near the scale of the Attica rebellion in the United States. At approximately 4:20 a.m. on Thursday, September 9, 1971, 5