Autumn Lady's Tresses Spiranthes spiralis.
Broad-leafed Helleborine Epipactis helleborine ssp helleborine, and it is just opening the last few flowers on the top of its tall spike of maybe a hundred individual flowers. The species is pollinated by social wasps, and a couple of weeks ago I photographed a wasp Vespula sp going crazy trying to access the nectar in the flowers. To be honest, I can't believe this particular wasp was doing any pollinating, because the flowers were past their best and I assume would have been fertilised some days earlier. I was surprised to see the wasp so excited and determined, as I would have thought the flowers had stopped producing nectar.