Kenilworth Ivy (Cymbalaria muralis) is another self seeder (I find it to
be rather a weed), but it does have a mounding habit not dissimilar to
nasturtiums, and has pale blue flowers. I don't know how easy it is to
establish in the first place.
--
Stewart Robert Hinsley

Hi SR
couldn't find Cymbalaria but wondered if it was the same as this?

Linaria maroccana Fairy Lights Mixed
Hardy Annual. Pretty little flowers resembling tiny antirrhinums are freely
produced over a long period in many beautiful colours. An effective and
easily grown annual.
http://seeds.thompson-morgan.com/uk/en/product/1268/1

thanks
Suzanne