Area in the London Borough of Hillingdon and the county of Hertfordshire
Northwood
Northwood is a town mostly within the London Borough of Hillingdon, located 14.5 miles northwest of Charing Cross.
Northwood was part of the ancient parish of Ruislip, Middlesex. The majority of the town is situated in the London Borough of Hillingdon but most of the northern part of the town is situated in Hertfordshire. Northwood shares post towns with parts of Hertfordshire. Since the Middlesex side of the town being incorporated into Greater London in 1965, has been on the Greater London boundary with that county. It has also been within the Metropolitan Police District since 1840. The Northwood Headquarters is on the Hertfordshire side.
Text adapted from Wikipedia, CC BY-SA 4.0. Photograph: Mike Peel (see Commons), Wikimedia Commons.