NVC community U6 (Juncus squarrosus - Festuca ovina grassland) is one of the calcifugous grassland communities in the British National Vegetation Classification system.
It is a comparatively localised community.
There are four subcommunities.
The following constant species are found in this community: One rare species is associated with the community, Greater Pawwort, Barbilophozia lycopodioides.
This community is found locally in the uplands of Wales, northern England and Scotland.