John,
I have this in the garden - I think it is an annual and it seeds around and reappears now and then. I cannot remember the name. Maybe it was a Bulbine or Bulbinella. I have a feeling that my mother got seeds of it from Chiltern Seeds, many years ago, and I got some from her. I have looked quickly on the Chiltern website but cannot see it. This is going to annoy me now!