The main soil groups are given and for most polygons, a lower level of Soil Type is also provided. Additionally, for each spatially mapped polygon, up to 3 different soils may be identified and their percentage occurrence within that unit specified. Whilst the soil codes and percentage values are provided for all three potential soils identified within a single polygon, only the primary soil type is identified by name. The Forestry Commission (FC) soil classification system, listed by Pyatt (1982), is the one most commonly used in forest soil survey work; by foresters, forest managers and within FC publications and was specifically constructed to serve silviculture, distinguishing soils on the basis of drainage and nutrition. This system was used within the Ecological Site Classification (ESC): a PC-based decision support system for British Forests. Inevitably, the FC soil classification system has evolved since its conception; some soil types have been removed, others introduced. Attribution statement: © Forestry Commission copyright and/or database right 2026. All rights reserved. Contains OS data © Crown copyright and database right 2026.