Interesting conjectures,
Alfirin, and welcome to the Downs. Surprisingly, there aren't many gardeners here. Perhaps since we are all dead in the Barrow (a running joke, somewhat hobbled from overuse) most of us tend to be more among the compost than the flourishing plants.
Alfirin could also be a bellflower, which comes in a variety of colours and which has both low, ground-hugging varieties and taller forms. At least, I think this plant conforms to the bell shape and white is a predominate colour for it. It is also a willowly, whispy plant that shimmers in the wind.
For some images of the peach leaf bellflower, see
here.