Unidentified plant

Unidentified plant

Observation - Unidentified plant - UK and Ireland. Description: Apologies for the awful photos - this plant was growing out of a patio in an urban area. Unfortunately it had finished flowering and was dying back - the flowers were very small and yellow and produced small seeds with white feathery wings (almost like sm

Apologies for the awful photos - this plant was growing out of a patio in an urban area. Unfortunately it had finished flowering and was dying back - the flowers were very small and yellow and produced small seeds with white feathery wings (almost like small dandelion seeds). The plant was about 30-40cm in height and the leaves/stems were slightly purplish in colour. Have been unable to ID this from field guides so far!