NVC community CG10 (Festuca ovina - Agrostis capillaris - Thymus praecox grassland) is one of the calcicolous grassland communities in the British National Vegetation Classification system.
Of the upland group of calcicolous grasslands, it is the only one with a short sward associated with heavy grazing.
It is a comparatively widely distributed community in the British uplands.
There are three subcommunities.
The following constant species are found in this community: The following rare species are also associated with the community: This community is found widely on calcareous upland sites in Scotland, northern England and Wales.