Silene coronaria Rose Campion I
This is a commonly grown garden plant introduced from southern Europe which escapes and competes surprisingly well in rough countryside. The site for this plant has decreasing numbers but they have been present for nearly 25 years competing with brambles and tall herbs.
Silene coronaria has escaped effectively in the south east of England and is found most often around centres of population as you would expect. So in Scotland there is some round the central belt and some near Inverness. Only a little has escaped in Wales and Ireland.
Silene coronaria is a new name in New Flora of the British Isles Edition 3 by Clive Stace for Lychnis coronaria.