West London Orbital


The West London Orbital is a proposed extension to the London Overground that makes use of a combination of existing freight and passenger lines including the Dudding Hill Line, North London Line, and the Hounslow Loop. The route runs for approximately 11 miles from and at the northern end to at the western end via,,,, South Acton and.
The route would improve rail connectivity across West and North London and establish a number of new connections to existing radial rail infrastructure including Thameslink, the Jubilee line, the Bakerloo line, High Speed 2, Crossrail and the Piccadilly line. It is anticipated the line will be operational by the mid-2020s, reflecting the fact that it makes use of existing underused rail infrastructure rather than requiring significant lengths of new track or tunnels to be built. The planned line follows a portion of the route of the former Super Outer Circle that was operated by the Midland Railway from 1878 to 1880.
An unrelated scheme of the same name was previously proposed in June 2008 by the West London Business group. That proposal involved the construction of a new underground line across West and South West London and did not progress beyond concept stage.

Detail of the scheme

The West London Orbital line consists of a number of distinct sections: The Dudding Hill Line, the North London Line and the Hounslow Loop. The Dudding Hill line itself has had no scheduled passenger service for over a century. It has no stations, no electrification and a speed limit with semaphore signalling, and is lightly used by freight and very occasional passenger charter trains. It is roughly long.
Near the site of the West London Orbital would connect to the existing North London Line, and then further south at Acton, use the link down to the Hounslow Loop to reach and. Taken together, this set of routes would be known as the “West London Orbital” railway.
In March 2017 the West London Alliance group of local authorities commissioned a study to assess the feasibility of the line so that a decision could be taken as to whether it merited pursuing further. This study found that:
In June 2017 Transport for London published the Mayor’s Transport Strategy, which stated that London government would work with the relevant boroughs to explore the feasibility of the proposed service, that would become the West London Orbital. In March 2018 the Mayor's Transport Strategy was published, which includes a proposal for this orbital connection to Old Oak between Hounslow and Brent Cross.

Current position



The London Mayor's Transport Strategy, published on 28 February 2018 and ratified by the London Assembly on 8 March 2018, includes plans for a West London Orbital railway line under Proposal 88. The mayor’s proposal for the service highlights that utilising new and existing orbital connections in west London could also improve public transport connections in the city centre.
The West London Alliance group of local authorities have expressed support for the West London Orbital Scheme, and have confirmed that it will be incorporated in to all Local Plans. Discussions are currently underway between West London councils and London government on the future of the scheme.
A number of independent analyses of the scheme have been published, including by Modern Railways magazine and the independent blogging community
In April 2019, £320 million of funding was approved for a new Brent Cross West railway station, that would also serve the potential new service.
In June 2019, Transport for London published the Strategic Outline Business Case for the scheme and concluded that there was a strong case for the scheme as it had a medium to high benefit-cost ratio. TfL found that for 8 trains per hour in the core the BCR was between 1.4 to 1.8 and for 4 trains per hour it would be 1.7 to 2.0. As the scheme was found to have a strong business case, TfL stated that it intended to proceed to the next stage which will look at how the scheme can be funded. A more detailed business case is expected to be developed in the next 18 months.

Earlier proposals

A number of routes have previously been examined for new orbital tube lines and improved connectivity across West and North London. It was considered that the most likely route of the previous proposal would be a north–south route running from Brent Cross to Surbiton, via Wembley Park, Ealing Broadway, Richmond and Kingston fully underground, connecting several London Underground and National Rail lines, including the forthcoming Crossrail at Ealing Broadway.
The proposal envisaged an underground driverless light rail train system similar to the Docklands Light Railway, and updated "to the most modern standards". The transit time from Brent Cross to Surbiton was quoted as 28 minutes, with a maximum train speed of.
The promoters cited a number of reasons why they believed an underground scheme would be cost-effective at £1.75 billion: with lower tunnelling costs as the tunnel diameter would be smaller than for a heavy rail scheme; there are no other rail tunnels to avoid ; and the subsoil strata are suitable for modern tunnel boring machines.

Alternative orbital schemes

A number of other notable orbital rail schemes for London have been previously proposed: