Hi, I'm sure that it is a Ornithogallum, however the lack of leaves makes me wonder whether it is O.umbellatum. Searching a bit through different dbases, including my Willis dictionary of flowering plants, there seem to be as many as 150 species from the Old world. RHS has 183 entries. So perhaps it is one very simmilar to O.u. but flowers when leaves die out. I remember last summer that a small group of my O.u. did flower after the leaves yellowed so I even cannot discard this species as well. Somehow the umbell in this pic is much more open than my O.u.s and the flower stalk is longer and sturdier.
