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  • Andrew P.M. Wright

Southern Railway 1920's ‘Mogul’ Steam Locomotive Hauls Train on Dorset Main Line for First Time

History has been made with a 1920s Southern Railway ‘Mogul’ steam locomotive hauling a train on a Dorset main line for the first time in 52 years – thanks to the Swanage Railway.

Included in the test run were two challenging five-mile climbs between Weymouth and Dorchester as well as a five-mile climb from Maiden Newton to Evershot on the line to Yeovil.

Swanage Railway ‘U’ class steam locomotive No. 31806 hauled the empty five-carriage test train which had a 1960 ex-British Railways heritage Class 33 diesel-electric locomotive on the rear.

The seven-hour test run of 115 miles on the main line – No. 31806 hauling the train a total of 57 miles at speeds of up to 60 mph – took place on Friday, 13 April, 2018.

The route for No. 31806 – known as a ‘Mogul’ because of its 2-6-0 wheel arrangement – was from Swanage to Worgret Junction, where the train joined the main line, and then to Wareham before the run to Dorchester and Weymouth.

Then it was back to Dorchester and up to Yeovil, back down to Weymouth and then up to Dorchester again before the test train returned to Wareham and Worgret Junction where it ran on to the Swanage Railway.

In tow were five 1950s ex-British Railways carriages that the Swanage Railway has, like No. 31806, upgraded for main line running. No members of the public were on the train.

The upgrade of No. 31806 – so it could haul a train on the main line – was made possible thanks to a £75,000 Government grant to the Swanage Railway Trust from the Department for Transport as part of its Heritage and Community Rail Tourism Innovation Competition. The Trust supplied £25,000 of labour towards the work.

With No. 31806 equipped with the required signalling and monitoring equipment required to run on Network Rail, the upgrade work to the locomotive and carriages gives the Swanage Railway the potential to run special steam trains to Wareham in the future.

Swanage Railway Company chairman Trevor Parsons said: “The successful test run of a Swanage Railway steam locomotives on the main line was a marvellous and very special piece of railway history – the first time since 1965 that a Southern Railway ‘Mogul’ class steam locomotive had run on a Dorset main line.

“No. 31806 performed very well and kept to time throughout its test run through Dorset and Somerset – the locomotive is certainly capable of hard work and has earned its main line spurs.

“The seven-hour test run on the main line was a tough one – the locomotive hauling a 358-tonne train up the steep gradient between Weymouth and Bincombe twice and also tackling the challenging climb between Maiden Newton and Evershot on the line up to Yeovil Junction.

“I would like to thank all the people on the Swanage Railway who have worked so hard to make this test run happen as well as Network Rail, for allowing the test run to take place on the main line, and the Government’s Department for Transport for its £75,000 grant towards 31806’s main line upgrade work.

“My thanks also go to the staff of the Yeovil Railway Centre, next to Yeovil Junction station, where No. 31806 was watered and serviced before its return to Dorset as well as West Coast Railways which provided the crews for the test train.

“Designed by Southern Railway’s Richard Maunsell and built in the late 1920s, 31806 made a startling sight as it passed modern main line Class 444 ‘Desiro’ electric trains, built in the early 2000s, between Wareham, Dorchester and Weymouth.

“No. 31806 also passed 1980s and 1990s diesel trains running on the line from Dorchester up to Yeovil. Some passengers probably couldn’t believe their eyes as they saw a steam locomotive pass the window of their modern train,” added Mr Parsons.

The Richard Maunsell-designed No. 31806 departed Swanage station on its historic main line test run at 12.24pm on Friday, 13 April, 2018, with the train returning to Swanage at 8.42pm after running 115 miles on the main line.

At the rear of the historic test train was Swanage Railway-based 1960-built Class 33 diesel-electric locomotive No. D6515 ‘Lt Jenny Lewis RN’ which was the last locomotive to run from Poole to Wimborne before Wimborne station closed in 1977.

The Class 33 diesel-electric locomotive hauled the train from Wareham to Weymouth, Yeovil Junction down to Weymouth with No. 31806 hauling the train for the rest of the test run.

No. 31806 took on water at Yeovil Junction and Weymouth during its test run which saw the classic locomotive, built in the late 1920s for the Southern Railway, keep to time throughout its test run across Dorset.

The steam and diesel locomotive crews for the main line test run were supplied by West Coast Railways with Swanage Railway staff also being on the locomotives.

No. 31806’s main line test run was ahead of the steam locomotive hauling part of a main line ‘GB X1’ excursion train from Cardiff to Swanage on Thursday, 26 April, 2018, with the special train running from Swanage to London on Friday, 27 April, 2018.

The Swanage Railway Trust is restoring Southern Railway ‘N’ class ‘Mogul’ steam locomotive No. 31874 with the restoration of a second Southern Railway ‘Mogul’ locomotive – ‘U’ class No 31625 – in the pipeline.

To help the Swanage Moguls Fund with donations or other assistance, visit

Photographs by Andrew P.M. Wright,

Swanage Railway official photographer and press officer.

The Swanage Railway always welcomes new volunteers so, for a chat, contact Swanage Railway volunteer co-ordinator Mike Whitwam on 01929 475212 or email him at

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