Metal Detecting in the UK: Law, Treasure, and the Code

The UK is one of the best places in the world to metal detect, and it is also one of the most legally structured. That combination is not a coincidence — the framework exists because the hobby has genuine archaeological consequences, and detectorists who work within it have contributed enormously to what is known about British history.

This is an orientation, not legal advice. The rules differ across the four nations, they change, and the details of any particular find or piece of ground can shift the answer. Treat everything here as a starting point for checking the official source.

Permission comes first, always

Before any of the treasure law matters, there is a much simpler rule: all land in the UK belongs to someone, and you need that person’s permission to detect on it.

There is no such thing as “common land you can just detect.” Public parks belong to a council. Beaches and foreshore are typically managed by a local authority or the Crown Estate. Woodland may belong to the Forestry Commission or a private estate. Footpaths across fields are rights of way for passage — they carry no right to search or dig.

Detecting without permission is trespass, and where you dig, it can escalate considerably further. It is also the single fastest way to damage the reputation of the hobby locally, which affects every detectorist who comes after you.

Get permission in writing where you can, and agree in advance what happens if you find something valuable. Our guide to asking a landowner for permission covers how to approach the conversation and what to put in a simple written agreement.

Where you cannot detect

Some ground is off-limits regardless of who owns it or how willing they are.

Scheduled monuments are protected sites, and detecting or disturbing them without written consent from the relevant heritage body is a criminal offence. This is the big one, because scheduled monuments are not always visibly obvious in a field. Historic England, Cadw, Historic Environment Scotland, and the Northern Ireland Historic Environment Division all publish searchable maps — check before you detect on any land with visible earthworks or a known historic association.

Sites of Special Scientific Interest and nature reserves usually prohibit ground disturbance.

National Trust land does not permit metal detecting.

Ministry of Defence land is prohibited, and unexploded ordnance makes this a physical safety matter as well as a legal one.

Protected wrecks and designated military remains carry their own restrictions in the intertidal zone and offshore.

If a piece of ground has an obvious history, that is a reason to check its status carefully, not a reason to hurry there.

The Treasure Act in England and Wales

The Treasure Act 1996 defines a specific category of find that is legally treasure and must be reported.

The core definition covers metallic objects other than coins that are at least 300 years old when found and contain at least 10% gold or silver by weight; groups of two or more coins of that age found together, with different thresholds depending on precious metal content; prehistoric base metal objects found in association; and objects found with items that are themselves treasure.

The Treasure (Designation) (Amendment) Order 2023 added a significance-based route. Exceptionally important finds can now be designated treasure on the strength of their historical significance even where they are base metal and fall outside the old material thresholds. The Crosby Garrett helmet is the example usually cited — a find that would not have qualified under the original definition but would now.

Reporting: potential treasure must be reported to the coroner for the district where it was found, within 14 days of finding it — or within 14 days of realising that it might be treasure, which matters when identification comes later. In practice, the sensible route is to contact your local Finds Liaison Officer, who will handle the process with you.

Failing to report treasure is a criminal offence. If you are unsure whether something qualifies, report it — the system is designed to absorb that uncertainty, and nobody is penalised for reporting something that turns out not to be treasure.

A treasure find goes through a valuation process, and where a museum acquires it, a reward is typically shared between finder and landowner. This is exactly why the finds agreement in your permission conversation is worth having before it becomes relevant.

The Portable Antiquities Scheme

The PAS is voluntary, and it is one of the genuinely good things about detecting in England and Wales.

Finds Liaison Officers — based in museums and councils across the country — will identify and record your finds free of charge. Recorded finds go into a public database that now holds well over a million objects, and that database has reshaped academic understanding of periods where detectorists find far more material than excavation ever could.

Recording is worth doing for entirely selfish reasons too. You get an expert identification, a permanent record, and photographs, all for free. And the database is superb for identifying your own finds by comparison, since it is full of material that came out of the same kind of ground yours did.

Our full guide to recording finds with the PAS covers what an FLO needs from you, what happens at a recording session, and how findspot confidentiality is handled.

Before you take anything to an FLO, resist the urge to clean it — our guide on cleaning finds explains why a dirty find is far more useful to a specialist than a scrubbed one.

Scotland is genuinely different

Do not carry English assumptions across the border. Scotland operates under an entirely separate system.

Under Scots law, all portable antiquities of archaeological, historical, or cultural significance found in Scotland must be reported to the Treasure Trove Unit at National Museums Scotland. Not just gold and silver. Not just objects over 300 years old. The Crown has a claim to ownership of such finds through the principle of bona vacantia, and reporting is a legal obligation rather than a voluntary courtesy.

This is a substantially broader duty than the Treasure Act imposes, and it applies to material that would be entirely unremarkable in England.

An independent review of Treasure Trove in Scotland was launched in 2023, so this is an area where the detail may continue to evolve. Check the Treasure Trove Unit’s current guidance rather than relying on anything written a few years ago — including this.

Northern Ireland requires a licence

Northern Ireland is the strictest of the four nations, and this catches people out badly.

Searching for archaeological objects in Northern Ireland requires a licence from the Department for Communities under the Historic Monuments and Archaeological Objects (NI) Order 1995. Detecting for archaeological material without one is an offence, and it is enforced.

All archaeological objects found must also be reported. The Treasure Act applies in Northern Ireland alongside this additional licensing regime, so both sets of obligations are in play.

If you are detecting in Northern Ireland, start with the Department for Communities rather than with a landowner.

The Code of Practice

Beyond the law, there is the Code of Practice for Responsible Metal Detecting in England and Wales, supported by the PAS, the National Council for Metal Detecting, and the Federation of Independent Detectorists.

It is not legally binding, but it is what separates the hobby from its worst reputation:

• Get permission, and agree finds ownership beforehand
• Do not detect on protected sites
• Fill every hole, and leave no trace
• Report treasure within the statutory period
• Record non-treasure finds with the PAS
• Do not clean or conserve finds yourself
• Record findspots as accurately as you can — ideally to within a few metres
• Stop and seek advice if you encounter a concentration of material, human remains, or anything that suggests an archaeological context

Joining the NCMD or FID is worth considering for the third-party public liability insurance alone. Many landowners will now ask whether you are insured before granting permission, and being able to say yes makes the conversation considerably easier.

Findspot accuracy matters more than you think

That point about recording findspots deserves its own emphasis, because it is where detecting practice and archaeological value meet.

An object with no findspot is a curiosity. The same object with an accurate location becomes evidence — it can be plotted against other finds, related to landscape features, and used to identify a site that nobody knew existed. Finds Liaison Officers routinely say that a decent grid reference is the difference between a record that contributes something and one that does not.

This is straightforward to do well. Drop a GPS pin the moment you recover something, before you move on. Recording it in the field takes seconds; reconstructing it from memory two weeks later produces a guess. In DetectingLog the location is captured with the find itself, alongside depth, the signal you got, and a photograph, which is close to exactly what an FLO will want to see.

It also serves you directly. Accurate findspots are what let you see that a scatter is clustering in one corner of a field — the pattern that tells you where to concentrate next time, and the sort of thing your hunt data will surface once you have enough of it recorded.

Getting started sensibly

Join a local club. It is the fastest route to permissions, identification help, and an understanding of what turns up in your area. Clubs also hold their own permissions and organise digs, which solves the hardest problem a new detectorist has.

Get insured through the NCMD or FID before you set foot on someone’s land.

Find your local FLO and introduce yourself early rather than at the point where you have something you are worried about.

Read the Code of Practice properly. It takes ten minutes.

And keep a proper record from your very first hunt. Findspots, depths, and dates are trivially easy to capture as you go and nearly impossible to reconstruct afterwards — which is the whole argument for keeping a detecting logbook in the first place. If you are completely new to the hobby, our beginner’s guide covers the gear and field habits that make the rest of this straightforward.

The UK framework can look intimidating written down. In practice it comes down to three habits: get permission, check whether the ground is protected, and report what you are supposed to report. Detectorists who do those three things reliably are the reason the hobby still has the access it has.