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  • Safety

Danger Areas

By Jonathan Elder

Published on 4 min read


Danger Areas (or how not to wander into an artillery barrage)

If you’ve been using OS Maps’ ‘standard’ mapping recently, you may have noticed we’ve added some places marked as ‘Danger Area’. These areas are used by the military for training.

There are 16 large areas and 104 smaller ones, dotted all over the country. The total land area is around 240,000 hectares. That’s about the size of Cheshire! Most are wild moors and remote areas, with a few extending out some distance offshore too.

Here are three views of the Danger Area at the appropriately named Cape Wrath, in the far North West of Scotland’s mainland.

Danger Area on OS Maps 'Standard' map

Danger Area on OS Maps ‘Standard’ map

Danger Area on OS Explorer (25k) map

Danger Area on OS Landranger (50k) map

Danger Area on OS Landranger (50k) map

Danger Area on OS Explorer (25k) map

‘Standard’ mapping shows a red tint with a red border. You can zoom in to see more detail. It is available for free on both the web and mobile app versions

OS Landranger maps show the words ‘Danger Area’ over the area, but do not show the exact extent, just an indication or the area.

OS Explorer maps have wide triangles on the border of the Danger Area, pointing inwards

If you’re planning on going somewhere in or near a Danger Area, there are definitely things you need to know…

Danger area sign

What are the Danger Areas used for?

Lots of things! It could include rifle ranges, artillery ranges, bombing practice, infantry survival training, tank driving, beach landings and more.

Some areas also include elements of forestry and farming, and for them you should also be aware of the Countryside Code.

Are all Danger Areas completely off limits?

No, but there are restrictions to when and where you can go. Some have roads, footpaths and bridleways crossing them. Others will have no public access at all.

How do I know when I can go into a Danger Area?

There are five things you should check:

  1. Check the details for the particular area at https://www.gov.uk/guidance/defence-infrastructure-organisation-and-the-defence-training-estate. Look under ‘Access Opportunities’ to find information on what areas are accessible, public rights of way and even what to look for when you are there.
  2. Check the Firing Notices! These will list times when many of the larger areas are in use.
  3. Look for red flags in the day or red lights at night. If you see them, do not cross the line of flags or lights, as it means the area is in use and you will put yourself in danger.
  4. Look for local signage. All ranges will be clearly marked by warning signs. At some sites you may also find notices posted on local notice boards on access roads and footpaths. These will give safety information and days or dates when the Danger Area is closed to the public.
  5. Obey any instructions from military personnel. However, don’t approach them unnecessarily, as you might disrupt the training.

Don’t go into a Danger Area when it’s closed, not even for a little shortcut, or when someone who’s not in uniform tells you it’s safe. Local signage, flags and lights override any previously published information, which can go out of date quickly if plans change.

Typical Danger Area sign

When I’m in a Danger Area, what do I need to be aware of?

Aside from the normal Countryside Code on not leaving litter, keeping pets under control and leaving gates as you find them, there are some extra things specific to Military Danger Areas you should be aware of.

  • Where advised stick to marked paths, roads and tracks. Even when the Danger Area is open, leaving public paths will put you at risk as you could come across things like unexploded ordnance.
  • Pay attention to any additional signs inside the Danger Area. Parts may be closed, or there may be tracks in use by vehicles.
  • Don’t pick up, kick or otherwise mess with anything ‘interesting’ you find lying around. Military debris might have explosives, dangerous chemical residue or just be very sharp.
  • Don’t go into or too near any buildings or old vehicles you may encounter (even if it’s raining). Some may well be structurally unsafe, having been previously used for target practice!
  • Leave military personnel and equipment alone and keep out of the way of vehicles. They might be in the middle of an exercise, and military vehicles are big, heavy and can move fast, even off-road. This also goes for your dog!
  • Wash your hands before you eat and clean your footwear after leaving, to avoid ingesting or transferring anything you may have encountered.
  • Even when a Danger Area is open to the public, it might be in use. There could be blank firing weapons, smoke or flash pyrotechnics, troops hiding in bushes and vehicles from quad bikes to trucks. You may want to keep nervous dogs (and possibly humans) on a leash.

There’s a Right of Way marked on the map. Does that mean I can use it at any time?

That’s a big ‘No’ to that! Military land often has special byelaws that temporarily close Public Rights of Way when ranges are in use. This overrides your normal rights to use that footpath or bridleway.

Public Right of Way sign

My planned route crosses a Danger Area that’s got red flags or lights, but there’s nothing happening. Can I cross quickly?

Another ‘No’ for this one too. Even if you cannot see or hear anything, it’s not safe to enter. Some areas are used for everything from long range artillery to bombing practice, and you might not even be aware of them until it hits.

Can I wild camp in a Danger Area that’s currently open to the public?

The answer to this is almost always ‘no’. Wild camping is only fully legal in Scotland, but byelaws may prevent you doing so on Military land in Scotland Estate. Due to the rapidly changing nature of military training, for your safety it is really not recommended!

I’ve just encountered a line of flags or lights… which side is the Danger Area?

You need to check your OS Explorer paper map or OS Maps app. The free ‘Standard’ mapping will show the danger area with a red tint. The direction the flags are pointing is to do with the wind, not the direction of the Danger Area (and yes, someone has used this as an excuse!)

What about Danger Areas at sea?

The rules are similar – planned firing times will be posted locally and online. Red lights or flags will be shown on the mainland.

Radar and safety boats monitor the area, and boats are contacted via radio if they are going to stray into the Sea Danger Area.

Banner image: Road to Cape Wrath By Sandro

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By Jonathan Elder

Jonathan helps run the OS Shop and GetOutside, and in his free time can be found walking, playing computer games or, in the winter, falling off mountains with a plank of wood strapped to his feet.


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