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Class 126 Swindon Inter-City DMU

Preservation – The story of the Class 126 unit after BR service

Why DMU preservation?

The first Diesel Multiple Unit trains were revolutionary at the time of introduction in the 1950’s. Initial experience with early types was so positive that a rapid building programme was undertaken, nearly 4000 railcar vehicles being built in total, with a few of these first generation railcars lingering in service into the 2010s. The concept has proved so successful that almost all passenger trains on today’s modern railway are multiple unit types.

The 1950’s DMU therefore represents an important transition between the steam railway of yesteryear and the modern Sprinters, Turbostars and Voyagers of today.

Why this particular train?

The Class 126 DMU was built especially for Scottish Region services, and as such hold special interest for the SRPS. All the units spent their entire working lives in Scotland. The unit is the only surviving example in the UK of the higher specification Inter-City type. The centre trailer vehicle is unique in that features both first and second-class compartment accommodation. In addition we have a buffet car from the original 1956 batch, one of only three surviving DMU catering vehicles.

As such, these trains were felt to be an important part of Scotland’s railway heritage. The last of the 1959-built versions ran in 1983 and accordingly one was rescued for preservation at that time with assistance from the Royal Museum of Scotland. It is now an important part of the SRPS’s collection of historic railway vehicles at Bo’ness in West Lothian.

What is the story of the train?

Designed for a life span of 15 to 20 years, by the 1980s the class 126 units were looking decidedly run down. Each unit had covered over 2 million miles in service. Once-modern interiors had suffered from the wear and tear of millions of commuter journeys – and at the hands of vandals. By this time Scottish Region had begun to take delivery of the first of the ‘Sprinter’ type units and the requirement for the ‘first generation’ units was greatly reduced. Due to mechanical differences in their construction, the class 126 cars were not compatible with other DMU types, and so were selected for withdrawal, the last two units surviving in service until January 1983. The best of these vehicles were selected for preservation.

The Royal Scottish Museum assisted with a generous donation of 50% of the cost, with the rest being made up of donations from SRPS members, proceeds from sales events, railtours, etc.


The three Ayrshire vehicles moved to the Caledonian Railway in May 1983. The line runs from Brechin to Bridge of Dun, the vehicles were normally stabled at the later. This was the early days of the railway, it was only just starting to run regular public trains when we left in 1993. The vehicles still contained asbestos, and we had to somehow deal with the costly removal and rebuild. And as the vehicles aged more and more work was required to stop them deteriorating, and the with the active membership based in the Glasgow area a solution was found to both issues by selling the vehicles to the Scottish Railway Preservation Society and moving them to their base on the Bo'ness & Kinneil Railway. The first vehicle, Sc51043, arrived there on August 17th, 1993, the other two followed a few days later.


Full scale restoration of the train began in 2000 with the aid of a grant from the Heritage Lottery Fund. The interiors of the units were completely destroyed due to the requirement to remove the asbestos insulation to ensure the long term survival of this most interesting train.