tall white flower

I have looked on the internet and watched the video of her garden and I see the Viburnum Opolus Sterile in the background and the light tall airy Fairy plants which soften the whole effect look to me exactly like the Wild cow Parsley or in the gardening books it is there under Anthrisous Sylvestris or Queen Anne's Lace mid Spring to early Summer flowering 39" tall, others but a little later flowering are Wild Carrot,June/Aug 100cm and Fools Parsley or upright Hedge Parsley July /Sept. 120 cms. but they bring these on out of season it is difficult to judge by that. But she did use British Native Plants. See what you think if no one comes up with the definate answer. Good Luck . P.S If it is that mixture and dainty effect you want to recreat. Try mixing a few Hesperous which you will see on the last row of page six of my Photos and mix those in with some of the ones I have mentioned.