An abundance of this everywhere, I can't believe I don't know what it is.

Maybe a variety of Bellflowers (Campanula) ??

I agree! There are many varieties available.

Could be either Campanula portenschlagiana or Campanula poscharskyana.
I grow both in my garden and can't remember which is which.

On closer inspection I would go with Portenschlagiana because of the Anthers.

aleema said: On closer inspection I would go with Portenschlagiana because of the Anthers.

??????
Maybe you can explain to me the difference in the anthers?

Campanula flowers can look very similar.
What do the leaves look like.
Have you checked ALL the details to tell one from another.
I wouldn't touch taking id any further than Campanula from just a single image.