The Chesterfield couch and other furnishings from the townhouse were the same ones from Upstairs Downstairs.
Lord Andover refers to the American President as Roosevelt. As the storyline takes place in 1910 or 1911, the U.S. President at that time would have been William Howard Taft. Theodore Roosevelt (1901-1909) would run again for President in 1912 as a third party candidate against his hand-picked successor Taft, but both would lose to Woodrow Wilson.