Common Hemp-Nettle agg. (Galeopsis tetrahit agg.)

Common Hemp-Nettle agg. (Galeopsis tetrahit agg.)

Observation - Common Hemp-Nettle agg. (Galeopsis tetrahit agg.) - UK and Ireland. Description: Frequent clumps / individual plants growing in long grass and stinging nettles. From distance looked like Lamium album but for red sepals. Didn't check stem shape. Any ideas?

Frequent clumps / individual plants growing in long grass and stinging nettles. From distance looked like Lamium album but for red sepals. Didn't check stem shape. Any ideas?