No interactions present.
Yesterday I found a colony of a similar plant, but with patent rather than reflexed leaf teeth.
I finally concluded that what I had found was Mentha x villosa cf nothovar alopecuroides - if I got that right then presumably you've got this plant with reflexed leaf teeth right as Mentha suaveolens.
Lat/Lng: 51.3906, -2.34075
OS grid ref: ST763657