Campanula

This lovely purple flower is a wall bellflower.

It is difficult to get a sense of scale from these photos, especially as I don't know what size these pictures will appear on your screen. The bud in the second shot was just a couple of milimetres across and the open bloom was no more than a centimetre. They would have been easily overlooked but with the help of my macro lens we get to enjoy a nice close up view of a real gem.