This looks to me like a marsh orchid of some kind but it was growing on the verge of a former railway-line and was well drained.
No interactions present.
This genus is a minefield, and what D. majalis means depends on who you believe. The taxonomy I use (because I am too old for new tricks, and it is the current NBN/NHM dictionary usage, though majalis does not appear at all in the BSBI online map list) is to regard D. purpurella and D. majalis separately. If you want to use other taxonomies, they are both D. majalis with various sspp.
The overwhelmingly common orchid of this group in Scotland is purpurella (whether species or ssp.), and this is almost certainly what it is. The lip is variable in the taxon, even ignoring hybrid influence.
The other taxa included as subspecies of majalis are very scarce and restricted in Scotland and not known from this area (see the NBN or BSBI maps). Too early in the morning for more of this!
recording wildlife with The Recorder's Year on www.hbrg.org.uk/TRY.html.
"The taxonomy of Dactylorhiza is very unstable and there seem to be as many conflicting views on the genus as there are people studying Dactylorhiza ..."
Perhaps we should:
1) Look at the population, not the individual
2) Consider the variation over the whole geographical range of D. majalis (e.g. Flora Europaea 5, p. 335)
3) Consider as many lines of evidence as possible, including DNA.
A nice little research project if carried out across the range of the species complex; most studies seem localized.
Anyway Kew says it is a species:
Lat/Lng: 55.5989, -2.4172
OS grid ref: NT738339