HomeInterestHeritage'Slam Door' unit on display

‘Slam Door’ unit on display


After five years of restoration, the National Railway Museum’s 2HAP unit, thought to be Britain’s busiest surviving rail vehicle, has gone on display at Locomotion, Shildon.  

Nicknamed ‘Project Commuter’, the restoration began in 2014 and was led by Chris Osman from the Network South East Railway Society, involving staff and volunteers at the National Railway Museum and Locomotion.

The two-car 2HAP ‘slam door’ electric multiple units would have been a familiar sight to commuters in the South of England, where they operated for more than three decades. The National Railway Museum’s example, unit number 4308, is believed to have travelled a record-breaking 2.7 million miles and carried an estimated 5.3 million passengers during its working life. 

Project Commuter began in York, where the interior of the car was stripped and the seat cushions and backs cleaned. Metal work was cleaned and repainted, aisle ends were varnished and seat bases retrimmed.

However, at this point, corrosion in the bodyshell was found to be worse than first thought and the unit was transferred to Shildon where the workshop team began the painstaking task of stripping the carriage back to bare metal and replacing damaged metal and timber.

The left side of the 2HAP, showing its Network South East livery.

Once all repairs were complete, the carriage body was repainted with Network South East livery on one side and British Rail blue and grey on the other – both of which would have been carried at different points in the unit’s history. The 2HAP thus became the only vehicle in the National Collection to feature a dual livery.

The repaint also included such details as the black triangle used to indicate the position of the guard’s van.

By October 2018, the new floor had been laid and seats reinstalled featuring a specially manufactured, authentic moquette.

Chris Osman from the
Network South East Railway Society

The completed 2HAP unit is now on display at Locomotion and work is underway to restore the second carriage, which should be complete by the end of the year.

Chris Osman from the Network South East Railway Society said: “Without our team of volunteers who were active in York and Shildon, the restoration could not have been completed so thank you to everyone who has supported the project since 2014 for your ongoing dedication.”

The name ‘2HAP’ indicates that the train is formed of two carriages – and only one of these has a toilet compartment (something of a problem on longer commutes as the carriages were not linked).

The 2HAP unit was built at Eastleigh Works in 1959 for phase one of the Kent Coast electrification, a £25m scheme that replaced steam hauled trains from London to Dover, Folkestone, Ramsgate and Sheerness. The unit was withdrawn in 1995 and joined the National Collection in 2006.

To mark the unit’s 60th birthday, Locomotion organised a public event which gave visitors the chance to see the finished carriage, to climb inside the refurbished interior and to find out more about volunteering.

Dr Sarah Price, Locomotion.

Staff and volunteers also ran behind-the-scenes workshop tours to give visitors a glimpse of current and future restoration projects. The event was part of a season of public events and activities at Locomotion to celebrate the museums’ 15th birthday, which falls on 22 September.

Head of Locomotion, Sarah Price said: “I am very pleased to celebrate the completion of the first 2HAP unit. Since 2006, workshop trainees and volunteers at Locomotion have restored 18 rail vehicles, making a very significant contribution to preserving the UK’s railway history – something they can be very proud of.”


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