For a couple of years, I traveled a lot, often to London. I must have stayed in the Langham Hilton 20 or more times.
My favorite thing about this hotel is the staircase. It is very wide with a beautiful red carpet. The stairs themselves have a very low rise. You could run down them really fast, or glide down them, pretending to be British royalty. An old, elegant hotel like this evokes these kinds of actions, a least for me.