There isn't much (if any!) of the "wildwood" that once covered much of UK remaining. Fragments of this ancient woodland remain, including a few locations in Scotland were small areas of the Caledonian pine forests remain. This project aims to increase the diversity of native tree species in these fragments, but it is part of wider attempt by conservationists to preserve and extend these unique habitats. For example, Trees for Life (a charity based in Scotland) have planted a million trees in areas that were once Caledonian forest. A fascinating and controversial conservation story!
work over the past 25 years to reduce grazing pressure from deer had already resulted in the natural regeneration of Scots pine... native shrub and broadleaved species, such as juniper, birch, rowan, alder and willow, have been slower to recover. These species are regarded as a "critical element" of the ecology of Caledonian pine forest.