Saw lots of Wild Basil (Clinopodium vulgare) growing all over the place on recent walks in Hertfordshire. Most prolific in dry grassy areas but copes with a bit of shade in scrub, hedgerows and woodland glades.
A relative of culinary Basil though not as pungent or flavoursome by all accounts. The dainty two lipped, three lobed flowers are characteristic of the Lamiaceae family of plants. Much visited by butterflies, note the Brimstone fluttering off at the top of the frame.
Actually I took this photo on a rare sunny day a couple of weeks ago. A very wet July, about double the average rainfall for the country as a whole. Last year a record heatwave; this year warm but wet, wet, wet.