No interactions present.
Certainly an Eyebright. You aren't likely to get a more specific id. A very difficult group.
Please see my Flickr photo's www.flickr.com/photos/129804972@N07/
Euphrasia sp, 20 microspecies or more, 6 specimens required for experts to positively id. them; readily inter-breed.
Lat/Lng: 57.6775, -3.1423
OS grid ref: NJ319658