Solved Any idea? 5ft tall...

Hooray... the flower has arrived! Here it is. Hope that makes the decision easier

 

I kept well away from this up till now.
It needed more research.
I agree it is Campanula sp...but which one? Hmm! They all look so alike.

There seem to be 2 main contenders.
I have now looked them up...in
"Campanula A Gardeners Guide" by Peter Lewis and Margaret Lynch........and can try to give simple/easy tip.

Campanula Latifolia ..quote..."both leaf and stem are slightly hairy."
whilst.
Campanula pyramidalis ..quote "is glabrous"...ie without hairs.

I cannot see any evidence of hairs, so am opting for Campanula pyradimalis.
Hope this helps
But I may be wrong!

 

Thank you so much! There are definitely no hairs in the leaves. I will make sure I make a note of its name now! :-))