Ancient woodlands are areas that have been continuously wooded since at least 1600AD (1750 in Scotland). They are the primary woodlands with wildlife communities, structure and soils that have been modified the least. Ancient woodland contains a diverse number of species and is considered to be a historic part of our landscape which is irreplaceable.
There are two different types of ancient woodland:
- Ancient semi-natural woodland. This is woodland that has developed naturally.
- Plantations on ancient woodland. This is woodland planted on sites that previously contained ancient woodlands.
 Features and processes
Ancient woodland is typically composed of:
- Vegetation layers (canopy, understorey, field and ground).
- Irregular canopy structure.
- Veteran trees.
- Large amounts of dead wood (standing and fallen).
- Undisturbed soils.
- Sustained natural regeneration in gaps.
Ancient woodland and its associated soil have been shaped over centuries by the interaction of natural disturbance, local climatic conditions and soil conditions, solar radiation, temperature, atmospheric moisture and nutrient cycling.
Local planning authorities are advised to conserve and enhance biodiversity. In particular in relation to ancient woodlands, harm should be avoided wherever possible and the National Planning Policy Framework (nppf) states:
‘...planning permission should be refused for developments resulting in the loss or deterioration of irreplaceable habitats, including ancient woodland...unless the need for, and benefits of, the development in that location clearly outweigh the loss’.
Developments can affect ancient woodland directly through the loss of trees or damage to the root systems and soils, or through pollution incidents or changes to the woodland’s drainage or water table.
 Locations of ancient woodland
The locations of ancient woodland sites over two hectares have been mapped and are available online from the MAGIC website and Forestry Commission. The databases are not considered to be complete and therefore it may be necessary to commission an ecologist to undertake an ecological survey in order to identify any ancient woodlands within development sites or close to them, that may be unrecorded.
 Related articles on Designing Buildings Wiki.
- 11 things you didn't know about wood.
- Chain of custody.
- Definition of tree for planning purposes.
- Designated sites.
- Forest ownership.
- Forest Stewardship Council.
- National nature reserves.
- National parks.
- National Planning Policy Framework.
- Permission for felling or lopping a tree.
- Planning permission.
- Sustainably procuring tropical hardwood.
- Tree hazard survey.
- Tree preservation order.
- Trees in conservation areas.
 External references
Your new weekly update on employment opportunities totalling more than £150K of annual income. For applicants or employers - IHBC Jobs etc is the first place to visit.
Visit the Speakers’ webpage which highlights speakers and topic areas, so now prospective delegates can see the theme and topic areas relate to their CPD priorities.
IHBC’s first Research Note for 2018 offers our regular update of ‘Market Intelligence’ on local authority (LA) conservation-related jobs from our ‘IHBC Jobs etc.’ service.
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IHBC members may find a useful introduction to the thorny subject ‘Building Design’ in an article on DBW and anyone with special skills, interests or concerns can add to it.
The Scottish Parliament Information Centre (SPIC) has launched a briefing paper by Alan Rehfisch on the ‘Planning (Scotland) Bill-How the Scottish planning system works’.
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Blockchain technology has the potential to be a transformative force in the construction industry, says the Construction Blockchain Consortium (CBC).
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Jodrell Bank Observatory has been chosen as the UK’s nomination for World Heritage site status in 2019, Heritage Minister Michael Ellis has announced.
The Postmodern former home of journalist Janet Street-Porter in London has won Grade II-listed status for its ‘wholly untraditional’ and ‘extroverted’ aesthetic.