London W1

W1 is a London postal district located mostly in the City of Westminster with a small part in the Borough of Camden. It comprises the heart of the West End, including Soho, Mayfair, and Marylebone. The district is bordered by Charing Cross and Tottenham Court Roads to the East, Euston and Marylebone Roads to the North, Edgware Road and Park Lane to the West, and Piccadilly to the South.