I think this is a Germander Speedwell but am not sure. It is just another from the few wildflower pictures I took last summer. I did try cloning out the half petal in the foreground, but it didn't look right and neither did cropping to leave it out. Perhaps somebody might do a mod.
Settings: F/6.3 1/800sec ISO400 manual @420mm handheld
Thank you so much for your great response to my Buttercup upload - really appreciated