Lucy marvels at the view from the balcony of their London hotel as the bellhop opens the curtains, revealing a cityscape featuring the West Front of St Paul's Cathedral, which looks to be a couple of blocks away. She asks the bellboy {Sam Edwards) where Buckingham Palace is, and he goes out onto the balcony and points to it. "Oh, Ricky", Lucy gushes, "We can see it from here!" The problem is that St Paul's, in the City of London, is about 2.5 miles from Buckingham Palace, in the City of Westminster, and there is virtually no location where one could see the Palace and have St Paul's West Front just a couple of blocks away. If nothing else, when looking at St Paul's West Front, the Palace would be (miles) behind you.
Being an American citizen, Lucy wouldn't have to bow before the Queen.