No interactions present.
Possibly the remains of a Campanula? Quite a poser, Johnny Riddle!
University of Edinburgh and Biodiversity Observatory (OU)
Quite clearly Oenothera. Probably seed capsules have been opened by finches, did you see any? capsules only open partly then the birds get at them and dig deeper. My crops of Oenothera were often partly stripped by flocks of hundreds of finches in the autumn.
Lat/Lng: 51.721, -1.199
OS grid ref: SP554027