The Anonymous Widower

Northern Line Could Be Extended To Clapham Junction In Regeneration Plans

The title of this post, is the same as that of this article on the South London Press.

These three paragraphs outline the story.

Clapham Junction could be set for a huge overhaul as a council is set to investigate whether the Northern line should be extended to the busy railway station.

Wandsworth council has revealed a masterplan for Clapham Junction and the surrounding areas, including the Winstanley and York Road estate.

The overhaul hopes to create new homes, offices and shops for the area, and also promises a probe into whether extending the Northern line to Clapham Junction would make sense.

This has always been in the plans for the Northern Line and the route is safeguarded.

January 31, 2023 - Posted by | Transport/Travel | , ,


  1. I can understand the idea of extending the Battersea Power Station extension, even if it only went to Southern Railways’ Battersea Road Station which is a 3 minute walk from Queenstown Road Station on the Southwestern Division line. No line in a modern urban transport system should terminate without forming part of an interchange with train, tram or major bus line.
    Clapham Junction as an enhanced transport hub should probably be prioritised on the prospects for Crossrail 2, even if it takes another 20 years to get it underway.
    Personally I’d like to see the Northern Line extended to Morden South by adapting part of the existing Morden depot. This would enable passengers to change to the Southern and Thameslink services to Sutton and possibly West Croydon where some London Overground services currently terminate.

    Comment by fammorris | January 31, 2023 | Reply

  2. There has been a lot of innovation in the design of metro systems in the last few years.
    I wonder if as a lot of the route between Battersea Power Station and Clapham Junction will be under Battersea Park, that a very innovative and easy-to-build route will be used.

    Battersea Power Station has lots of crossovers, so perhaps the line could extend from Battersea Power Station in a single-track loop loop, that run under all the platforms at Clapham Junction at right angles.

    There could be either one or even two passenger tunnels alongside the single loop, linked to the Clapham Junction platforms by short escalators and lifts.

    Comment by AnonW | January 31, 2023 | Reply

  3. I always thought that this extension would only happen hand-in-hand with the completion of Crossrail 2.
    The argument being that lots of people, during peak hours – going on to the west end – would get onto the Northern line earlier, rather than at Waterloo. Thus packing trains sooner.
    Although commuting dynamics have changed after you know what, and it may well be expedient to extend sooner and split the Northern into two distinct lines. . . but where’s the money coming from?!

    Comment by Dave | February 1, 2023 | Reply

    • I wrote about splitting the Northern Line into two here.

      Thoughts On Splitting The Northern Line

      I think that there are four main things that need to be done at Camden Town.

      1. Simplify Camden Town Junction.
      2. Add two extra cross passages at the Northern ends of the four platforms. One would be between Northern High Barnet and Northern Edgware and the other would be between Southern High Barnet and Southern Edgware.
      3. Sort the signalling so that trains could run Morden and High Barnet via Bank and Battersea Power Station and Edgware.
      4. Develop the new entrance at Hawley School to link to the new cross tunnels.

      I am fairly certain, that most of this could be done with a full service going through.

      I’m going to update the related post.

      The project is not as big as Bank, which cost £700 million and it requires no long tunnels, so I will estimate that the station can be split for under £400 million. As there is substantial oversite development possible on the new entrance and opportunities further North, I suspect property developers could provide a substantial share of the cost.

      There would need to be work done at Kennington.

      I also believe that each branch of the Northern Line could handle thirty trains per hour, as the Victoria Line does.

      Comment by AnonW | February 1, 2023 | Reply

  4. An extension from Battersea Power Station should go to Balham and Clapham Common (whose platforms need a rebuild anyway) else Tooting Broadway. Better for that to relieve the southern branch of the Northern line than to detour everyone on Crossrail 2 to Balham.
    Reducing the scope of Crossrail 2 (just a straight line WIM-CLJ-VIC-TCR…) makes that more likely to proceed at all.

    Comment by MarkN | February 2, 2023 | Reply

  5. […] I wrote in Northern Line Could Be Extended To Clapham Junction In Regeneration Plans, the extension of the newly-built extension to Battersea Power Station station could be further […]

    Pingback by Thoughts On Extending The Northern Line To Clapham Junction « The Anonymous Widower | February 4, 2023 | Reply

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