1990 Strangeways Prison riot administrative offices on the lower floor and the chapel on the upper floor. Remand prisoners were held in wings G, H, I and K of a separate prison, linked to the main prison through workshops and a kitchen. The Certified Normal Accommodation Figure for Strangeways, the number of prisoners the prison was designed to hold, was 970. The population of the prison had increased in the months before the riot, from 1,417 in January 1990 to a peak of 1,658 on 27 March. On 1 April, the prison contained 1,647 prisoners – about 925 convicted adult prisoners, 500 remand prisoners
HM Prison Ashwell which extended to the edges of Oakham. Several prisoners were evacuated from the prison. Trouble started at approximately 0100 BST on 11 April and a fire broke out at the prison during the afternoon. The riot was successfully brought under control at 2245 BST that day. The operation launched by authorities in response to the riot was called Operation Tornado which saw the introduction of specialist riot-trained prison staff. Three prisoners were injured and 75% of the prison was made uninhabitable. The riot started when a prisoner, serving a three-year sentence, confronted staff and refused to return to his room.