Red Dead-nettle

This is an early flowerer: Lamium purpureum or Red Dead-nettle. The Dead-nettles are a big family with the Latin name Lamiaceae (also known as Labiatae). It includes the mints, thymes, woundworts, marjorums and sages.
The true nettles, Urticaceae, are a different family. Telling them apart can be useful.