Little White Flower.....!

I have a huge drift of this pretty little white flower but I don’t know what it is called...!
It loves the sunshine and has really opened up over the last week...it can be invasive..it’s probably meant for a rockery or wall where it can spread freely but it’s easy enough to keep under control and trimming it back hard doesn’t do it any harm...took this pic late in the evening as I was busy in the garden again today and out shopping for some bits and pieces...inserts for hanging baskets ...Miraclr Gro...some more bedding plants and a neat little table for my lower patio...
Anyone watch The Wedding....?? Thought it was just beautiful and the weather.......!