Another pretty grass from the garden: Melica uniflora or Wood Melick. It is common except for the far north of Scotland and the islands. It is usually found in woods, especially the edges of rides and hedgebanks. It dies back in the winter, which is apparently unusual for a woodland grass. Seeds rarely germinate so its regeneration is mainly rhizomatous.
The BSBI handbook tells me that not very much is known about its ecology, which seems odd to me but what do I know.