I'm normally quite good with naming garden plants, English or botanical names but I got it wrong yesterday and was glad of help in the comments.
Now, I've never seen this plant in my garden before but a few weeks ago someone I follow, suejay50, I think, put up something similar and it turned out to be a form of campanula. Not the bell shaped type I'm used to.
The day started very wet but when the weather dried up I got out and completed Week 4 of Couch to 5K. I was amazed!
Couch 2 5K Week 4/9 Run 3/3