In August 2018, during an interview with "BBC Breakfast", Stewart announced the launch of the Ten Prisons Project. He argued that, despite five years of continuous rise in violence in prisons, it was possible to turn it around. Stewart argued that it could be done through improving perimeter gate security (to catch drugs) and by improving training and support of staff. The key, he said, was to get the basics right. He undertook to create a new prison officer handbook and a new course at the training college for prison officers. Stewart pledged, in the same interview, that he would resign if this project was not successful. The twelve months statistics showed a continuing positive trend when, in August 2019, the results from the Ten Prisons Project were published. These showed a 16% drop in the rate of assaults, and a 17% drop in the number of assaults, almost 10% greater than the national trend. At the same time, the percentage of positive results from random mandatory drug tests dropped by 50%. According to blogger Elliot Tyler, published by "The Canary", he later described prisons as "the most shocking failure in British civilisation".