London doesn’t have a Little Italy to match New York but the south west area of Clerkenwell was the historic Italian neighbourhood of city and called Italian Hill or Italian Quarter.
When Italians starting settling in the area in the 19th century is was better known for thieves and pickpockets and featured in Dickens’ Oliver Twist.
Clerkenwell is part of Islington borough which along with neighbouring Camden is still home to a significant Italian born population. But more are found further west. Westminster and Kensington and Chelsea have the most with near identical numbers of Italian-born residents at a little over 4,000 each.
The last census shows that there are 62,000 Italian born Londoners and 63% are in inner city neighbourhoods.