Source: Hello! magazine (Online).

A family confirmation of this wedding date comes from Princess Beatrice's younger sister, Princess Eugenie, via her Instagram. It mentions the venue of the wedding as St. James' Palace, London, and the venue of the wedding reception as Buckingham Palace, London, as well as the fact there will not be any carriage procession and that the wedding will not be televised.

https://www.hellomagazine.com/royalty/2020020784422/princess-eugenie-princess-beatrice-throwback-photo-bridesmaids/