I've got it Meadowland, I bought it last year, in Home Bargains or somewhere similar. If I can divide it you could have a bit, or if it produces seeds you could have some.
It grows wild quite commonly around here.

Oh Hywel you are a saviour! Thank you soo much...what ever is easiest.

I also have it and if it sets seed I'll save some for you too.

it is a British native so perhaps look at suppliers of wild flowers also.

It's very pretty when you see it in swathes on damp ground.
It seems to enjoy the sides of a road in a near-by industrial estate, somewhere I wouldn't expect to see it really ... unless it was already growing there before they built the factories.

Thank you so much Eileen...I looked at a few sites but they were out of stock...I always seem to be late in looking.
Is that near to you Hywel...how lovely to see them growing wild.

Yes, the industrial estate where I've seen them grow is about 5 miles from this village, but they are really very common around here.

Lucky you!