Hi Alan, it was definitely different to the ones I identified as being D. occidentalis (thanks for clarification on name) and was the only one that I found.
I've not seen D. maculata at that location but earlier in the year found Green-winged Orchids (orchis morio) in exactly the same area.
Below is one identified as D.occidentalis, though now I'm a bit uncertain, most had un-spotted leaves.
