Funnel shaped calyx with long teeth. Unpleasant smell when crushed.
No interactions present.
I'm very reluctant to disagree with David Trevan, but isn't this hedge woundwort?
Sorry Bob, hadn't seen your comment when I added my ID above, but we were clearly thinking along similar lines!
Entomologist and biological recorder
Hi and thanks. Hedge Woundwort was my alternative id. More note-taking in the field required!
Lat/Lng: 54.61468, -1.09656
OS grid ref: NZ584247
Lime-rich grassland on much disturbed ground and close to freshwater marsh.