Sites which have had continuous woodland cover since AD 1600 to the present day, though some sites may have been replanted at some point in the past

Areas of woodland which originated before 1600, and, in special circumstances, semi-natural woods of Post-1600 but pre-1900 origin.

Woodlands that have been in continuous existence since before 1600, particularly important for nature conservation.

identified by English Nature as areas of continuous woodland cover since 1600 resulting in the survival of certain rare plants and animals.

woodland which has had a continuous woodland cover since at least 1600AD and has only been cleared for underwood or timber production. It is an extremely valuable ecological resource, with an exceptionally high diversity of flora and fauna.

An area of woodland which has had a continuous cover of native trees and plants since at least 1600 AD, neither having been cleared nor extensively replanted since then. This date is adopted as marking the time when plantation forestry began to be widely adopted and when evidence in map form began to become available.

Woodland that is believed to have existed from at least medieval times

Woodland which has been in continuous existence since 1600 (1750 in Scotland).

Areas that have had a continuous woodland cover since at least 1600 and have only been cleared for underwood or timber production.

Ancient Woodland is a term used in the United Kingdom to refer specifically to woodland dating back to at least 1600 in England and Wales, (or 1750 in Scotland). Before this, planting of new woodland was uncommon, so a wood present in 1600 was likely to have developed naturally.