States of Guernsey Police Service States of Guernsey Police Service The States of Guernsey Police Service, known generally as the Guernsey Police, is the Police service for the Bailiwick of Guernsey, a jurisdictional sub-group of Crown Dependencies within the Channel Islands. The Service's enforcement jurisdiction extends across the entire Bailiwick and encompasses the Islands of Guernsey, Alderney, Herm, and Sark. In common with many communities, a historical development of parish constables formed the system of law enforcement for many centuries. In the nineteenth century the people of Guernsey complained that this system was inadequate for a growing population, and a professional police force was demanded.
Maritime history of the Channel Islands at La Hougue Bie, Jersey give evidence of either populations living on or visiting the islands. Guernsey and Alderney were separated from mainland Europe around 7,000 BC with Jersey some time after, but even at 4,000 BC the islands were close to the mainland coast for basic boats to move between islands. Archaeological evidence of trade from the Iron Age period is in evidence in the Islands, with goods manufactured on the western coast such as armlets, Breton pottery and amphorae from the Mediterranean indicating trade along the Atlantic coast from Iberia to Ireland. Armorica was the nearest trade zone.