Forestry Statistics 2011 - Sources

Sources: Woodland area and planting

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Woodland Inventories

The current National Forest Inventory is the first continuous inventory of British woodlands and is being conducted on a five year cycle.  Prior to the National Forest Inventory, a series of one-off woodland inventories took place in Great Britain every 15 years or so. 

Most inventories used slightly different definitions of woodland, so some apparent changes in area over time are due to changing definitions. The principal differences for inventories since 1905 are:

  • 1905  Felled areas and scrub were not included.
  • 1924  Undertaken by questionnaire; woods smaller than 2 acres (0.8 hectares) were not included.
  • 1947  Woodlands with an area of less than 5 acres (2 hectares) were not included.
  • 1965  Woodlands with an area of less than 1 acre (0.4 hectares) were not included.
  • 1980  Woodlands with an area of less than 0.25 hectares were not included.
  • 1995-99  Woodlands with an area of 0.1-2 hectares were included on a sample basis; some woodland missing from earlier surveys was included.
  • 2010 on  All woodlands with an area of 0.5 hectares or more have been included; all woodlands below 0.5 hectares have been excluded. 

Estimates of woodland area prior to 1905 have been obtained from a variety of sources, including:

  • Domesday Survey of England - for information in 1086;
  • Scottish Woodland History (TC Smout ed, 1997) - for estimate for end Middle Ages in Scotland;
  • Roy maps c1750 - for Scotland 17th Century estimate.

National Forest Inventory

In the latest inventory, a digital map based on aerial photography, satellite imagery and other data sources has been produced, from which estimates of total woodland areas have been derived.  Data are currently being collected for one hectare squares, covering a wide variety of topics, including ownership type, species and age.

Initial results for 2010 were published for countries (Great Britain, England, Wales, Scotland) in Spring 2011.  More detailed results and results for more detailed geographical breakdowns will be available at a later date.

Further details on the National Forest Inventory are available from www.forestry.gov.uk/inventory.

National Inventory of Woodland and Trees

In the 1995-99 inventory, data were collected for one hectare squares, covering a wide variety of topics, include ownership type, species and age.  The results were uprated to total woodland areas from a digital map based on aerial photography.

Results have been published for countries (Great Britain, England, Wales, Scotland) and for more detailed geographical breakdowns (regions and counties).

Further details on the 1995-99 National Inventory of Woodland and Trees are available from www.forestry.gov.uk/inventory.

Links to Forestry Statistics 2011

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