Brown Bent (Agrostis vineale)

Brown Bent (Agrostis vineale)

Observation - Brown Bent (Agrostis vineale) - UK and Ireland. Description: A tall grass becoming a distinctive dark purple as it ripens. In many ways similar to Yorkshire Fog but less heavy heads and darker colour. I'm sure it should be easy to identify but ... . Edit: Height 50-70cm. Ligules membranous and pointed. Photos sho

A tall grass becoming a distinctive dark purple as it ripens. In many ways similar to Yorkshire Fog but less heavy heads and darker colour. I'm sure it should be easy to identify but ... .
Edit: Height 50-70cm. Ligules membranous and pointed. Photos show grass after flowering. I now think this is Brown Bent (Agrostis vinealis) (title changed to this.) Further photo added.