I would love for the wedding to be at York Minster, but there is no way that Beatrice will inconvenience her beloved "Super Gran" so St. George's Windsor it will be.
I don't think any of her attendants will be adults, like Eugenie she will adopt the traditional aristocratic Brit practice of having all children with little Wolfie Mapelli-Mozzi perhaps being in the party. I love George and Charlotte but they are a little bit over exposed for family weddings at this point. I would adore to see little Prince Louis make his wedding debut, won't he be approaching 3 years in Spring 2020? Maybe a bit young?
I don't think this wedding will be a bit subdued. I suspect it will be just as lavish as Eugenie's and then some. I expect to see a few foreign Royals like Beatrice's old school chum Prince Amadeo of Belgium and Princess Elisabetta, and former PM David Cameron as well. I also would not be surprised to see nuptial celebrations taking place in Italy after the wedding in England.
If Edo is at least a nominal Catholic, perhaps a priest or bishop can impart a Nuptial blessing at the service.
As for her tiara, for sentimental reasons I am hoping for the York tiara even though I never found it particularly impressive.
I think ...I
hope....that her bridal gown will flatter her classic feminine body and be fitted tightly in the bodice and have a very full skirt with a bustle and a long train veil. I hope to see a champagne/ivory shade, which will look glorious with Beatrice's coloring.
I am very excited for this wedding, which I am almost sure will be about 7 mos from now(April)
