Magnificent Marsh Orchids.... or spotted orchids .... or hybrids?

Well, actually I'm not sure what these are, exactly. They were part of a swarm of hybrids between marsh orchids and common spotted orchids, growing beside the pond on Durham University's Mountjoy site. Whatever their precise identity, they are magnificent specimens. I have noticed that whenever these hybrid swarms occur you always get a few very robust, very floriferous specimens, probably displaying hybrid vigour, alongside many more that are much weaker plants.... and, quite often, a few albinos like the one on the left.