In article , Sacha
writes

Sacha, is there another name for this as I don't know it?

Lotus maculata or Lotus berthelotii.
http://tinyurl.com/7pnem will give you a pic of the latter.

Thank you for this - I took a look and I was impressed - I will
certainly try some this year - can they be kept inside during the Winter
and used again another year or are they one-off plants?

--
Judith Lea