Northern line Morden extension marks 100 years

The Northern line's extension to Morden reached its centenary on Sunday, September 13, 2026. The opening in 1926 saw the completion of a section of railway that ran from Clapham Common further south into south London. This development was significant for the Underground network, introducing new architectural standards and passenger amenities.

Cost and Employment

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The Morden extension project incurred a cost of approximately £5 million. At a time of considerable unemployment, the construction provided work for 4,600 men. Much of the funding was channelled through a government initiative designed to stimulate employment, with materials sourced from across the country, including iron tunnel rings from Nottinghamshire and Middlesbrough, steel railway track from Leeds and Middlesbrough, and cement from Kent and south Essex.

New Stations and Architecture

Six new stations opened on the extension: Clapham South, Tooting Bec (then Trinity Road), Tooting Broadway, Colliers Wood, South Wimbledon, and Morden. These stations were the first major commission for architect Charles Holden for the Underground. Frank Pick, general manager of the Underground Electric Railways Company of London, selected Holden to create stations that discarded ornamentation in favour of a modern, reinforced concrete design, making the entrance and purpose immediately clear.

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Morden station itself introduced a novel facility for the time: a car park. This was an early recognition of the potential for passengers to drive to the station and complete their journey into central London by train, a concept now known as park and ride.

Operational and Network Changes

The extension also brought operational changes across the wider network. New electric trains required additional storage, leading to modifications at Golders Green depot. To facilitate heavy overhaul work, a connecting tunnel was built between the Northern and Piccadilly lines at King's Cross, known as the King's Cross Loop, allowing trains to access Acton works. Approximately 300 additional staff were recruited to manage the new services.

The Morden extension, though adding a relatively short section of track, had a considerable influence. It extended the Tube's reach into south London, introduced Charles Holden's distinctive architecture to the network, and incorporated new escalator designs. The project also encouraged the integration of cars with public transport and necessitated infrastructure adjustments elsewhere on the Underground.