Common but what is it?

Common but what is it?

Observation - Common but what is it? - UK and Ireland. Description: Hi,I quite often see this plant but it's name has been eluding me for some time, seems to like edges of footpaths and road verges, leaves seem to vary between 10-25cm, looks like it is starting to flower. Any help much appreciated...

Hi,I quite often see this plant but it's name has been eluding me for some time, seems to like edges of footpaths and road verges, leaves seem to vary between 10-25cm, looks like it is starting to flower. Any help much appreciated...