A new colony of Dune Helleborines has been found in Warwickshire near Solihull. A lady on Facebook posted pics asking for an ID this evening and I've confirmed them as undoubtedly that species. This is the most southerly site in the UK and a first for the county.
I visited the site yesterday, having seen the very convincing photo's. Unfortunately the plant in the photo's was unusual in terms of the whole colony (of about 40 plants), in that it was the only one (currently in flower) without a viscidium.
As such, the plants appear to be the "duneslack" version of Broad-leaved Helleborine, very similar to those at Kenfig for example, often referred to as "youngiana". They are mostly sickly green in the whole foliage, with a rosette of pointed leaves at the base, a pale flower identical in colour to Dunensis, but without the very strongly recurved outer lip. As I say, they are all cross-pollinated.
Whilst disappointing from a species point of view, this is the first colony of this type that I have seen away from the coastal dunes, and may be present in this form on account of the habitat, which is an old sand and gravel workings.
I have photo's still on the memory card and will post them when I have processed them.