I'm on the email list for the Royal Collection Trust which includes managing visitors to Buckingham Palace, the Queens Gallery, the Royal Mews, Windsor Castle and Frogmore House. Got this email today with some fun things to see if you happen to be in London or Edinburgh from the end of Nov to Christmas.
https://email.rct.uk/4SVR-VHXJ-8E8602F0A21672E8U6WKUC879864E4EB774CD/cr.aspx?v=1
Plus if you haven't started your Christmas Cake, now is the time.