Scheduled monuments and metal detecting in England

Last updated: 9 September 2026

Of all the rules an English detectorist has to know, this is the one that turns a mistake into a criminal offence. Using a metal detector on a scheduled monument without written consent is against the law — and the catch is that a scheduled monument often looks like nothing more than an ordinary field. Here's what a scheduled monument is, why detecting on one is off-limits, and how to make sure you can see them before you walk on.

What is a scheduled monument?

A scheduled monument is a site of national archaeological importance that the government has given statutory protection — "scheduling" it. They range from the obvious to the invisible: stone circles and hillforts, but also Roman villas under farmland, medieval moated sites, deserted villages and prehistoric burial mounds ploughed almost flat. Scheduling protects the buried archaeology, whether or not anything shows above ground.

Why you can't detect on one

Under the Ancient Monuments and Archaeological Areas Act 1979, section 42, it is an offence to use a metal detector in a "protected place" — which includes any scheduled monument — without written consent. In England that consent is from Historic England. Using a detector there without it is a fine up to level 3 on the standard scale; removing an object you detect in a protected place without consent is far more serious, carrying up to an unlimited fine. This applies regardless of the landowner's permission — the landowner cannot waive it.

The National Heritage List for England

Scheduled monuments are recorded on the National Heritage List for England (NHLE), Historic England's single official register of the country's protected historic places. Alongside scheduled monuments it holds:

• Listed buildings — buildings of special architectural or historic interest.
• Registered parks and gardens — designed landscapes of historic interest.
• Registered battlefields — historic battle sites.
• Protected wreck sites — designated shipwrecks.
• World Heritage Sites — shown on the List, though designated internationally.

For a detectorist, the scheduled monuments are the key layer — but knowing the whole List helps you understand the protected landscape around a permission.

Section 42 consent

A "section 42 consent" is the written permission Historic England can grant to use a detector on a scheduled monument. In practice it's reserved for controlled archaeological work, not recreation — a hobby detectorist should assume it will not be granted. If you genuinely believe there's a good reason to detect on or near a scheduled site, the route is to contact Historic England, not to chance it. It's also worth knowing that detecting can be restricted on agri-environment scheme land (such as Countryside Stewardship agreements) even where the field isn't scheduled — see our guide to the law.

The ones that look like ordinary fields

The real danger isn't the stone circle you can see — it's the scheduled site you can't. A Roman settlement or a levelled barrow can sit under a perfectly ordinary arable field with nothing on the surface to warn you. That's why "it looked like any other field" is no defence, and why checking a map of protected sites is part of planning every trip. A cross-check with LiDAR often reveals the faint earthwork that explains why a field is scheduled in the first place.

Seeing protected sites on the map

You can look scheduled monuments up on Historic England's List and on the Government's MAGIC map — but doing it field by field, before every trip, is the step most people skip. Muld draws the National Heritage List for England directly on the map, on the same view as your LiDAR and historic maps, so a protected site is something you see at a glance rather than something you have to remember to check. It's a planning aid, not legal clearance — the responsibility to stay off a protected site is always yours.

Official sources

This page is a plain-language summary — not legal advice. Always verify a specific site against the official register before you detect nearby.