Geranium sanguineum L. Geraniaceae Dusky cranesbill. Herbaceous perennial. Distribution: Europe and temperate Asia. County flower of Northumberland. This seems to be the 'Sanguin geranium or Blood Roote', Geranium haematodes/haematites, of Lyte (1578).
Cranesbill - Dwarf Bloody | Friends School Plant Sale
Geranium sanguineum var. striatum | Stonehouse Nursery