NVC community W9 (Fraxinus excelsior - Sorbus aucuparia - Mercurialis perennis woodland) is one of the woodland communities in the British National Vegetation Classification system.
It is one of the six communities falling in the "mixed deciduous and oak/birch woodlands" group.
This is a community of northern and western Britain, particularly widespread in Scotland and Wales.
It is particularly well represented in Scotland and Wales, and the far northern counties of England.
It has also been recorded at a single site in Devon.