There are five species of plantain which grow in the UK and of these, two are far more common and widespread than the rest. The Ribbed (or Ribwort) Plantain (Plantago lanceolata) and the Greater Plantain (Plantago major). at this time of year, it's the Greater Plantain which makes its presence felt more than any other and, growing among the grasses of the meadows in these parts, it makes a far more attractive plant than it's colour would suggest.
Another plant, native to the UK, but which has spread to many other parts of the world, is the Redshank (Persicaria maculosa). This has apparently become quite widespread and troublesome in parts of the USA and when you consider that it is a member of the Polygonum or Knotweed family, it's not difficult to see why it takes hold so quickly.