HERB ROBERT : Geranium robertianum
You will probably come across this first as it happily arrives in your garden gravel. It has small pinkish flowers on slender reddish stems. Its roots are long, but can be easily pulled out from your gravel or flower bed. In spite of that it will be back next spring. In the places it is very welcome.
The Wildlife Trust though tells that herb-robert is a type of crane's-bill that is found in a variety of habitats, including woodland, hedgerows, rocky or exposed areas, scree slopes and coastal areas. Look for it in areas of shade away from acidic soils. Its small, pink flowers mainly appear between May and September, and its leaves emit an unpleasant, mousy scent.
It goes on : Traditionally, Herb-robert was used to treat nosebleeds and headaches, as a tonic for tummy upsets, as an antiseptic to help heal wounds, and even as a mosquito repellent.
WILDLIFE TRUSTS : https://www.wildlifetrusts.org/wildlife-explorer/wildflowers/herb-robert