Possibly self heal growing as a dense mat of creeping runners on edge of raised bed in garden.
No interactions present.
Probably not, but each time I see the picture, I can almost smell eau-de-cologne mint (but don't have it in the garden any more, so I can't go and check). But the leaves at the bottom of the picture look like selfheal.
Lat/Lng: 51.0, -3.2
OS grid ref: ST2224