Lamium amplexicaule, commonly known as henbit. It is a low-growing annual plant growing to 10–25 cm tall, with soft, finely hairy stems. The leaves are opposite, rounded, 2–3 cm diameter, with a lobed margin. The flowers are pink to purple, 1.5–2 cm long.
Captured this tiny mat of beautiful wildflowers on a rocky slope at the Norfolk Broads UK