Inaccurate calculation of prisoners’ release and sentence dates
First to latest report 20 Jul 2015 — 2 Jun 2021
Reports that mention this concern
3
Times this concern has been raised
4
Stated actions linked to this concern
5
What this concern includes
Includes failures in calculating, checking, recording or making available prisoners’ legally applicable sentence, release or parole dates when the failure can cause unlawful detention, delayed release or other unsafe custody decisions.
What is not included
Excludes general release planning, accommodation, notification or supervision failures where sentence or release-date calculation is not the deficient control.
Excludes generic prison record-keeping or key-date alerting failures unless they directly affect the accuracy or availability of sentence or release-date calculations.
Excludes legal disputes about sentence interpretation where the calculation process is accurate and the issue is only disagreement with the applicable law.
Excludes downstream detention or release decisions after the relevant sentence and release dates have been accurately calculated and made available.
Trends
Reports over time
Reports mentioning this concern, over time
Reports about this concern issued each year.
* 2026 is projected from reports observed to 7 Sep 2026.
Most frequent recipients
Most frequent recipients
Reports about this concern sent to each recipient.
HM Prison and Probation Service2
Ministry of Justice1
Executive agency2
Ministerial department1
Reports and published responses 3 reports
See individual reports that have raised this concern, and the actions taken in response
Milton Keynes
Concerns raised1
Failure to calculate prisoners’ release dates before recall decisions
Linked response
HM Prison and Probation Service
Stated actions An action is something a respondent says it has done, is doing, or plans to do in response to the concern raised.3
HM Prison and Probation Service
Add a NOMIS alert flag to identify prisoners whose unspent remand time may shorten custody or result in immediate release.
HM Prison and Probation Service
Prioritize sentence calculation when NOMIS identifies unspent remand time that may affect custody duration or immediate release.
HM Prison and Probation Service
Issue further communication to all staff on using NOMIS alerts and confirming recalled prisoners’ release dates as soon as possible.
Respondent positions A position is what a respondent says about the concern when they do not describe a specific action.2
HM Prison and Probation Service
Pre-recall release-date calculations cannot be undertaken by untrained staff because only trained staff calculate sentences during office hours.
Unable to actThe respondent said that a constraint prevented them from taking the relevant action.
HM Prison and Probation Service
Accurate release dates cannot be calculated before recall because the sentence balance and applicable recall type remain unresolved.
Unable to actThe respondent said that a constraint prevented them from taking the relevant action.
East Sussex
Concerns raised1
Delay in communicating actual release dates to custodial establishments
This report raised 1 other concern. They are not shown here because they do not form part of this recurring concern.
Linked response
HM Prison and Probation Service
Stated actions An action is something a respondent says it has done, is doing, or plans to do in response to the concern raised.1
HM Prison and Probation Service
Publish a new recall policy framework retaining the notification requirement and revising the timeframe to one working day.
Liverpool and the Wirral
Concerns raised2
Failure to provide timely clarification of prisoners’ sentence lengths
Failure to accurately calculate prisoners’ sentences under the applicable statutory provisions
This report raised 1 other concern. They are not shown here because they do not form part of this recurring concern.
Linked response
HM Prison and Probation Service
Stated actions An action is something a respondent says it has done, is doing, or plans to do in response to the concern raised.1
HM Prison and Probation Service
Review sentence calculations for the current prisoner population to identify miscalculated sentences.
Respondent positions A position is what a respondent says about the concern when they do not describe a specific action.1
HM Prison and Probation Service
No other prisoners were found to have miscalculated sentences after reviewing current population sentence calculations.
Disputes the concernThe respondent disagreed with part of the concern or the basis for it.
Actions and positions describe what organisations say in published responses. Implementation is not independently verified.