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Essential maintenance

HES is currently undertaking essential maintenance on our web services. This will limit access to services in the following ways:

- Subscription access for HES online services will be unavailable (Scran, NCAP)

 - Image purchasing options will be limited (Canmore, Britain from Above, Scran, NCAP)

 - Any enhanced services which require a log in will be unavailable (My Canmore, Britain from Above contributions, Scran contribute)

 General access to these services will all continue. Enquiries will still be able to be submitted.

 We anticipate services to be restored from Monday 1st February 2021.



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An often squat building with thick, loopholed walls and a flat roof, designed to accommodate a variety of weapons, usually strategically positioned to cover a vulnerable point in a defensive system.


Related Terms

Term Note
GUN EMPLACEMENT A fortified site in which a gun, mortar or cannon is positioned.
SLIT TRENCH A short trench used to protect troops or to provide defensive fire from, often dug for practice purposes.
TANK TRAP An object or structure designed to obstruct the progress of a tank or armoured vehicle. Use more specific term where known. Linked Data resource