The service's enforcement jurisdiction extends across the entire bailiwick and encompasses the Islands of Guernsey, Alderney, Herm, and Sark.

In the 19th century, the people of Guernsey complained that this system was inadequate for a growing population, and a professional police force was demanded.

[3] In late January 2019, Guernsey Police led the investigation into the high-profile disappearance of Argentinian footballer Emiliano Sala, whose aircraft had last made radar contact near Alderney.

JESCC does not offer on the phone medical advice like the 111 service but triages calls through a standardised set of questions as part of their computer-aided dispatch system.

'A' division special constables are full-time employees of third party agencies who are granted limited police powers within their workplace, to provide a first response whilst professional police officers are travelling to an incident; for example, a number of hospital porters are sworn as 'A' division special constables to provide an enhanced level of hospital security.

They are commonly deployed in tandem with professional colleagues at large scale public events, and during weekend periods.