I don't. It's poorly made - especially for a custom dress not available to buy.
Claire Mischevani dresses similar to this range between 900 and 1200 GBP.
Now look at the fit - was this Easter Dress properly made for her measurements? No. It's too tight in the bust area, it pulls at the waist.
And the embroidery is not stitched on the dress, it was on the fabric already - look how the yellow twine at the waist has been cutted through.
Bea has worn the same cut from same designer already twice to Ascot, the light blue one even with an almost identical hat in another color:
I'd say that if one spends more than 1,000 GBP on a dress, one might expect a better fit and better execution (the white one, for example fitted better).
The colours of yesterday's dress are nice and suit her, and the hat really goes well with the dress, and the general idea is good, but all in all, it's not a first class look.
Albeit I must admit I have seen much worse on Bea.