Someone who lives much closer or has a bigger travel budget than I do needs to go see
Starstruck in Belfast and report back on the costumes! I guess some of them survived the warehouse fire.
Also, marginally related: A friend of mine won an auction for Helen Mirren's character's University of Maryland coffee mug from National Treasure 2: Book of Secrets and sent it to my son as a gift (he's going to UMD in the fall). We were watching the movie last night to see if we could spot the mug and realized that Buckingham Palace in that movie is played by Lancaster House, just as in The King's Speech -- the Queen's study with the Resolute Desk is the same room that was Bertie's study where he and Lionel were rehearsing the final speech.