Hendon is an urban area in the London Borough of Barnet, northwest London 7 miles (11 km) northwest of Charing Cross. Hendon was an ancient manor and parish in the county of Middlesex and a former borough, the Municipal Borough of Hendon; it has been part of Greater London since 1965. Hendon falls almost entirely within the NW4 postcode, while the West Hendon part falls in NW9. Colindale to the northwest was once considered part of Hendon but is today separated by the M1 motorway.