Soloman's Seal is the common name applied to a number of plants in the Polygonatum genus. Three are native to the UK: P. multiflorum, P. odoratum and P. verticillatum. These and others have long been grown in British gardens. The one shown above is one of the three natives but to be honest I can't remember which I planted and they look similar. They are a woodland plant so tolerate some shade but they prefer a chalky soil. 
 The guru of forest gardening Martin Crawford says the young shoots can be eaten like asparagus though I haven't put that to the test. I wouldn't want to want to miss out on the graceful stems and flowers by eating them before they grow!