Self - heal

Our lawn has patches of this pretty flower.
My research leads me to believe it is so called Self-heal plant.

According to Wikipedia the plant has many medicinal uses
Prunella vulgaris, the common self-heal, heal-all, woundwort, heart-of-the-earth, carpenter's herb, brownwortor blue curls, is a herbaceous herb in the mint family Lamiaceae.

Prunella is derived from 'Brunella', a word which is itself a derivative, taken from "die Bräune", the German name for diphtheria, which Prunella was historically used to cure. Vulgaris means 'usual', 'common', or 'vulgar'

The young leaves and stems can be eaten raw in salads; the plant as a whole can be boiled and eaten as a leaf vegetable and the aerial parts of the plant can be powdered and brewed in a cold infusion to make a beverage.

The herb, which is called xia ku cao (夏枯草) in Chinese, is used in traditional Chinese medicine to treat dizziness, red eyes, dry cough, and dermatitis and boils. It is also a main ingredient in several herbal teas in southern China, including commercial beverages such as Wong Lo Kat.
The Nlaka ‘pamux people drink a cold infusion of the whole plant as a common beverage. The plant is traditionally used by some Indigenous cultures to treat various physical ailments.

If you don’t mind, I will stick to my beloved NHS.