Metal detecting and the law in the UK

All land in Britain has an owner. Detecting without the landowner’s permission is trespass; removing objects is theft. There is no public right to detect anywhere, including on common land, footpaths and beaches.

A written agreement is standard practice and clubs provide templates. It should cover who may detect, when, and how finds and any proceeds are divided between finder and landowner. The reason to have it in writing is not suspicion — it is that the division of a valuable find is exactly the moment a vague verbal understanding becomes a dispute.

Beaches and foreshore are owned, usually by the Crown Estate or a local authority. Many councils require a permit and restrict areas and seasons. Check the specific beach.

Detecting on a scheduled monument, or removing objects from one, without written consent is a criminal offence, and not knowing the site was scheduled is not a defence. Scheduled monuments are publicly mapped and searchable, and checking a new permission against that map takes a few minutes.

Similar restrictions apply to sites of special scientific interest, to land in some agri-environment schemes, and to Ministry of Defence and Crown land without consent. Illegal detecting on protected sites — "nighthawking" — is prosecuted, and it is the single biggest source of hostility between detectorists and archaeologists.

In England, Wales and Northern Ireland, the Treasure Act 1996 replaced the old common law of treasure trove. It defines treasure by statutory categories rather than by whether an object was hidden with intent to recover it, which is what made the old law unworkable.

The categories broadly cover objects of substantial precious-metal content over 300 years old, groups of coins found together, objects found in association with treasure, and certain further categories that have been added since. A finder must report a find that may be treasure to the coroner within 14 days of finding it, or of the day they first believed or had reason to believe it might be treasure. Failure to report is a criminal offence. In practice, reporting is done through the local Finds Liaison Officer, who handles the process.

If a museum acquires the item, a reward is normally payable and is usually shared between finder and landowner — which is another reason the written agreement matters.

Scotland works entirely differently and more broadly. Under the Scots law of bona vacantia, all ownerless objects belong to the Crown, and all archaeological finds must be reported to the Treasure Trove Unit, not only those of precious metal. A detectorist crossing the border is crossing into a different legal regime.

Most finds are not treasure and carry no legal reporting duty at all. Recording them with the Portable Antiquities Scheme is voluntary, and it is what separates the hobby from looting.

An object without a findspot is an ornament. With a recorded location it is evidence, and the accumulated database has supported substantial published research — including redrawing distribution maps for several periods that were previously known only from excavated sites.

Record findspots to at least an eight-figure grid reference. Take a photograph before cleaning. And do not clean: aggressive cleaning destroys surface detail and archaeological information permanently, and a Finds Liaison Officer would far rather see a dirty object than a polished one.