North and West London Light Railway

The Campaign for Better Transport aimed to reduce CO₂ emissions, pollution and cars on the roads. It has said that high-intensity bus services in Brent Cross create more pollution and traffic jams.[6]

The freight-only Dudding Hill line, which features in the proposal

The proposal suggested that the service could be light rail, similar to the Docklands Light Railway. The core proposal envisaged a line running east–west across north London from Brent Cross to Park Royal,[5] with extensions to Ealing Broadway and Wembley Stadium, and a new line running north–south from Finchley Central through Brent Cross to Finchley Road.

The routes would have used a combination of existing passenger railway lines, freight lines and disused lines, linked by stretches of new track. The network was to include the Dudding Hill Line, the Ealing Broadway branch of the Central line and freight tracks parallel to the Midland Main Line.[4]

The current and NWLLR-proposed rail track at North Acton

The proposal had limited support from some local councils, but lacked the funding or support from the Greater London Authority that is necessary to undertake project costings or a feasibility study. The proposal was not supported by the site developers at Brent Cross and relied on changes being made to their plans.[4]

In April 2009, Ealing Council voted to call on Transport for London to look into the proposal and discuss its strategic potential with neighbouring councils.[8] Harrow Council gave its support in principle, but stating that unless Transport for London provided "funding for a feasibility study to examine this proposal ... no more public money should be directed towards this proposal."[9] In 2009 Brian Coleman, the mayor of Barnet and London Assembly Member for Barnet and Camden, said "It's not feasible, it won't happen. Ideas like this are thought up by men who probably still have a train set in the attic."[10] Later that year, Barnet Council voted to request the developers to maintain contact with the light rail promoters.[11] In January 2011, Brent Council voted to call on Transport for London to look into the proposal and discuss its strategic potential with neighbouring councils.[12][13] In January 2014, Barnet Council voted that "much-needed orbital rail links should be investigated, routes safeguarded and included in financial planning", but it removed a reference in the original motion to "light-rail".[14]

In April 2019, £320M of funding was approved for a new Brent Cross West station, that would also serve the potential new service.[15]

A similar proposal was put forward by West London Business in 2008 to build a Surbiton-to-Brent Cross underground railway, called the West London Orbital.[16] In 2009, the Greater London Assembly proposed using the Dudding Hill Line section of the route for a new London Overground service.[17] From 2016 a different scheme of the same name was developed by the West London Alliance boroughs, TfL and the GLA. This scheme features in the 2018 Mayor's Transport Strategy.[18]