On calcareous substrates
No interactions present.
Its not ground ivy as I know it. It is really strong herb smelling. Sort of slightly lemony!
doesn't sound like ground ivy then - though probably Lamiaceae rather than a Scroph.
Looks as if plant has been in the bottom of your bag for a couple of days!
No I flattened it inside a clipboard to preserve it. Photographed and uploaded in 3 hours but it didnt like being cut off from its water supplies!
Lat/Lng: 53.8, -1.5
OS grid ref: SE3941