A prison "benchmarking" programme was introduced in 2012 by Grayling to reduce the costs of public sector prisons to match comparable private sector prisons, along with associated new core standards intended to result in prisoners having similar amounts of time spent outside their cells across similar prisons.
格雷林在2012年引入了一项监狱“基准”计划，降低公共监狱的成本以匹敌的私营监狱，以及相关的新核心标准，旨在使囚犯在类似监狱中在囚室外面活动时间相近。