Thomas the Tank Engine Wikia

Douglas (narrow gauge)

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This article is about the narrow gauge engine. You may be looking for the standard gauge engine.
  • Number: 6, formerly 1, 1431
  • Primary function: Passenger service
  • Class: Barclay E/Light Class
  • Designer: Andrew Barclay Sons & Co. Ltd.
  • Builder: Caledonia Works
  • Built: 1918
  • Gauge: 2ft 3in, originally 2ft
  • Configuration: 0-4-0WT
  • Driving wheel diameter: 2' 0"
  • Coupled wheelbase: 3' 11.25"
  • Total wheelbase: 3' 11.25"
  • Cylinder size (bore/stroke): 6.875 x 10.75"
  • Heating surface: 130 sq. ft.
  • Working pressure: 160 psi
  • Tractive effort: 3290 lbs
  • Weight: 8 tons
  • Length over buffers: 15' 6"

Douglas is a 0-4-0WT built in 1918 by Andrew Barclay and Co. Ltd. for the Airservice Construction Corps.


From 1921 until 1945, he worked at the RAF railway at Calshot Spit, Southampton. After a period in store at Calshot, he was bought in 1949 by Abelson and Co. Ltd. who presented him to the Talyllyn in 1953. After overhaul and alteration from 2ft to 2ft 3in gauge, he entered service in 1954 and was named "Douglas" at the donor's request. Although smaller than the other locos he has performed well and was returned to service in 1995, having been fitted with a new boiler, turned out in his old Air Ministry Works and Buildings livery.

Douglas spent many years painted red and blue and running under the guise of Duncan.

In 2013, he returned to service after an extensive overhaul. While he was out of service, Sir Haydn took on duties for the children's day by running under the guise of Sir Handel.


Douglas is currently painted gloss red with black lining. In his appearance in the Railway Series, he wears the same green livery as Talyllyn and Dolgoch.


Railway Series


  • Douglas' tall cab that scraped against the tunnels it ran through was an inspiration for the story of Home at Last. In addition, Douglas was known for being a rough rider due to its short wheelbase, which was what inspired Duncan's "rock 'n' roll" tendencies.


Talyllyn Railway
TalyllynDolgochSir HaydnEdward ThomasMidlanderDouglasTom RoltAlf

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