Moon daisy is used for several plants. I'm guessing you might mean Ox-eye Daisy, Leucanthemum vulgare. These are perennial and a British native wild flower. I expect you can buy them as plugs from a wild flower specialist nursery, or they are very easy to grow from seed.

Good it is the ox-eye,will look round thank you so much.

Take care Nite - some of the tender Leucanthemums look very like the ones you mean.