Valerium.

Its Valerian or Centranthus Ruber to give it its proper name, seeds everywhere, probably a pressy from the birds, there's a white form too called 'Snowcloud', love it :-)

Spreading everywhere in my garden, only brought 2 tiny roots from where I used to work.

Thank so much for their name Simbad - I shall now amend the heading!! I quite like them really!

I like them too Wildrose:-)

I started them off from seed when we first started the landscaping and they all self seeded very well.....on the next allotment! The westerlies blew them all from my garden and now all the allotments on that side have valerians growing except me!

Used to have loads none now, still no room......