This one looks like the hybrid to me. It certainly has hybrid vigour, easily the tallest and most robust helleborine in the wood.
Leaves are broad (obviously so in comparison with the VH's), green and heavily veined. I considered them to be outside the likely range of VH.
The spike and flowers look exactly like the VH and nothing like BLH, arrangement of the flowers is a bit unusual in that they are all round stem but a couple of VH in the colony were almost there.
One BLH and several VH were found not that far away.
Sorry for the rubbish photos but unfortunately that's the best I can do, I'm now ready to be shot down in flames!
Alan
Humble pie for supper again, I went to the site again today and by good fortune met a couple of very knowledgeable friends. The consensus of opinion is that it is in fact an unusual Violet Helleborine.
The leaves are green but not green enough, they are also broad but not broad enough, they are noticeably ribbed but not too ribbed and the plant is obviously robust but not too robust, I think that's me making excuses for being wrong.
I think I'll sod off and find a ghost orchid!
Alan