The West London Orbital is a proposed extension to the London Overground railway system in London, UK. The extension would make use of a combination of existing freight and passenger lines including the Dudding Hill Line, North London Line and Hounslow Loop. The route would run for approximately 11 miles (17 km) from West Hampstead and Hendon at the northern end to Hounslow at the western end via Brent Cross West, Neasden, Harlesden, Old Oak Common, South Acton and Brentford.