Rosebay Willowherb Epilobium angustifolium is despised by gardeners as it spreads like wild fire, due to its fluffy seeds which are dispersed by the wind to great affect.
The leaves are edible when young, as is the root, raw or cooked. The stem has been used to make natural cordage, although it’s not as effective as some other plants that you may find growing alongside it, such as nettles.
The hairy seeds make a good tinder and have also been used to stuff bedding and insulate clothing in the past.
Picture to follow