We went to see the Assembly Rooms in Bath today and stumbled across some pretty amazing costumes. I was only told off once for getting too close, trying to photograph the back of one of the gowns from the Duchess movie.
They were gorgeous up close, and I took many photos until the camera battery ran flat. Oh well, the iphone came to the rescue but the photos are not so good towards the end. See http://www.fashionmuseum.co.uk/whats_on/press_releases/2011/dressing_the_stars-1.aspx for more information.