Bromopsis ramosa hairy Brome C DD N
The drooping, typically Bromus type flowering spikes on this tall plant give a pointer to the identification but the main characteristic is that it has hairy socks.
Look towards the bottom of the main stem and you will see it covered dense hairs which can sometimes appear like white socks. This is another grass which has been renamed by the taxonomists. It was Bromus ramosus and is now Bromopsis ramosa.
It is found throughout England, Wales and Ireland and records seem to become fewer only in the very north of Scotland.