Deutzia Gracillis Rosea.
I have always thought that these pretty flowers that grow in a mass at the bottom of the garden were wild flowers. However I was reliably informed by the man who knows these things, that they are not wild but are a variety of Deutzia. They grow among some grasses that were rescued from a hanging basket a couple of years ago, which have really thrived from being planted in the ground. I don't care what he says I think of this bit of the garden as the wild flower corner.