Flowers on the wall + bee

Took Bramble for a walk this morning and at the end of the road is a two-metre high wall.  All the way along that wall were these purple flowers, looking quite lovely, even in the drizzly rain. The tough bee in the picture wasn't put off by the rain either as she bobbed from bloom to bloom.
Apple's Photos program updated recently and now suggests identification of flowers, trees, dog breeds etc when they appear in a photo. So far it seems to have been about 50% correct. In this case it suggested the flowers are Serbian bellflowers. It then sent me to Wikipedia for more information and I reckon it was right in this case...
Serbian bellflower, ampanula poscharskyana, the Serbian bellflower or trailing bellflower, is a semi-evergreen trailing perennial, valued for its lavender-blue star-shaped flowers. It is native to the Dinaric Alps in former Yugoslavia.