"at the corner of Duke Street and Piccadilly"
In real life, at the corner of Duke Street and Piccadilly is located not Pinn’s Accoutrements, but Fortnum and Masons - a department store and Royal Warrant holder. Its headquarters are at 181 Piccadilly where it was established in 1707 by William Fortnum and Hugh Mason. Fortnum and Mason is recognised internationally for its high quality goods and as an iconic British symbol. It is also the location of a celebrated tea shop.
is a major London street, running from Hyde Park Corner in the west to Piccadilly Circus in the east. Piccadilly is not one of London's principal shopping streets, despite the presence of several famous shops. The Ritz Hotel is in the street, along with some other luxury hotels. There are also some offices and some very expensive flats. Piccadilly is one of the widest and straightest streets in central London.