Additional data

Additional information on the safe, decent and secure running of the Prison Service.

Visit prisons and probation statistics for data sources and more details.


Prison performance ratings for 2017/18 were based on a data-driven assessment of a prison’s performance through the Custodial Performance Tool (CPT), with ratification by in depth scrutiny of performance over the year through an established moderation process.

Overall performance for each prison in the CPT has been graded into one of four bands. These bands are: 4: Exceptional performance; 3: Meeting majority of targets; 2: Overall performance is of concern; and 1: Overall performance is of serious concern. More information is available here.

Overall performance band detail

2017-18

Overall performance bandCount
Band 414
Band 350
Band 239
Band 115

Percentage of prisoners held in crowded accommodation.

YearCrowding
2017-1824.2%
2016-1724.5%
2015-1624.5%
2014-1525.5%
2013-1424.1%
2012-1323.9%
2011-1225.1%
2010-1124.2%
2009-1024.6%
2008-0925.3%
2007-0825.3%
2006-0724.6%
2005-0624.0%
2004-0524.4%
2003-0424.9%
2002-0323.3%
2001-0219.3%
2000-0118.2%
1999-0020.1%
1998-9920.0%

Apr 2017 to Mar 2018 24.2%

Crowding detail


A prisoner is released in error if they are wrongly discharged from a prison or court when they should have remained in custody, where the prisoner has not deliberately played a part in the error (i.e. the prisoner had no intent of escaping).

Examples include misplaced warrants for imprisonment or remand, recall notices not acted upon, sentence miscalculation or discharging the wrong person on escort.

YearReleases in error
2017-1866
2016-1772
2015-1664
2014-1549
2013-1450
2012-1344
2011-1242
2010-1163
2009-1068
2008-0963
2007-0831
2006-0752

Apr 2017 to Mar 2018 66

Releases in error detail


The chart shows Band 3-5 prison officer staff (full time equivalent) for public sector prisons at the end of each financial year. The detail view shows the financial year average for all staff.

YearStaff in post
March 201821,038
March 201718,403
March 201618,327
March 201518,222
March 201418,251
March 201321,506
March 201222,735
March 201124,369
March 201024,830

March 2018 21,038

At 30 June 2018 there were 21,608 Band 3-5 FTE officers in post.

For further context and commentary, please see the HMPPS Workforce Statistics Bulletin (PDF)

Staff in post detail


Staff sickness

Sickness absence (average working days lost per FTE staff) for operational grade staff in public sector prisons.

YearStaff sickness
2017-189.7 days
2016-1710.8 days
2015-1611.1 days
2014-1512.1 days
2013-1411.9 days
2012-1311.2 days
2011-1210.7 days
2010-1110.5 days
2009-1011.6 days

Apr 2017 to Mar 2018 9.7 days

For the 12 months to Jun 2018 there were an average of 9.9 working days lost to sickness for operational grade staff in public sector prisons.


The percentage of foreign national prisoners that were referred to the Home Office within 10 days of each relevant sentencing.

Foreign national prisoner referrals detail

2017-18

Foreign national prisoner referralsCount
Achieved target3,900.0%
Did not achieve target3,100.0%

A measure of prison spend against agreed annual budget.

Public prisons operating within budget detail

2017-18

Public prisons operating within budgetCount
Within budget7,600.0%
Over budget2,700.0%

The percentage of staff adequently trained to deal with incidents in prisons.

Control & restraint staff training (C&R) detail

2017-18

Control & restraint staff training (C&R)Count
Achieved target7,100.0%
Did not achieve target4,600.0%

The average number of staff adequetly trained to deal with more serious incidents in prisons.

Tornado commitment detail

2017-18

Tornado commitmentCount
Achieved target6,000.0%
Did not achieve target3,900.0%
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