Electronic monitoring caseload

Electronic monitoring was introduced in 1999 to support the police, courts, prisons and wider justice system in England and Wales.

It is a way of remotely monitoring and recording information on an individual’s whereabouts or movements, using an electronic tag which is normally fitted to a subject’s ankle. The tag transmits this information, via a base unit installed in a subject’s residence, to a monitoring centre where it is processed and recorded in case management systems. Staff in the monitoring centre review this information to see whether an individual is complying with the conditions of their curfew or other electronically monitored requirement. Where a subject is not complying, the electronic monitoring provider either acts on this information themselves or provides it to the relevant authority to take the necessary enforcement action.

The figures for 31 March 2019 include details of those on location monitoring tags, which were introduced in November 2018.

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

Electronic monitoring caseload

Total caseload.

YearElectronic monitoring caseload
31 Mar 201910,772
31 Mar 201811,205
31 Mar 201711,493
31 Mar 201612,583
31 Mar 201514,018

31 Mar 2019 10,772


As a condition of court bail.

31 Mar 20192,572
31 Mar 20182,794
31 Mar 20172,862
31 Mar 20163,658
31 Mar 20154,272

31 Mar 2019 2,572

Court sentence

As a requirement of a court sentence, including community orders and suspended sentences.

YearCourt sentence
31 Mar 20194,835
31 Mar 20184,781
31 Mar 20175,822
31 Mar 20166,194
31 Mar 20156,841

31 Mar 2019 4,835

Post release

As a licence condition following release from custody, including Home Detention Curfew.

YearPost release
31 Mar 20193,093
31 Mar 20183,329
31 Mar 20172,484
31 Mar 20162,240
31 Mar 20152,271

31 Mar 2019 3,093


As a condition of immigration bail, managed by the Home Office.

31 Mar 2019233
31 Mar 2018263
31 Mar 2017298
31 Mar 2016476
31 Mar 2015614

31 Mar 2019 233


to intensively monitor a small number of subjects including: some of the highest risk offenders managed under Multi-Agency Public Protection Arrangements (MAPPA); those granted bail by the Special Immigration Appeals Commission (SIAC); and those made subject to Terrorism Prevention and Investigation Measures (TPIMs). In these cases, monitoring may be by way of a Global Positioning System (GPS) tag rather than a radio frequency (RF) tag.

31 Mar 201939
31 Mar 201838
31 Mar 201727
31 Mar 201615
31 Mar 201520

31 Mar 2019 39

 back to top