Dougal is a 2 ft 6 in (762 mm) narrow gauge 0-4-0T steam locomotive, built by Andrew Barclay Sons & Co. Ltd., Kilmarnock in 1946.

In 1961 Dougal was saved from scrap and later sold to the Welshpool and Llanfair Light Railway.

[1] In 1969 Dougal was bought by the Welshpool and Llanfair Light Railway and was first steamed there in 1975.

Although too small to operate the standard service on the railway it is steamed regularly at bank holidays and gala weekends, where it can often be seen shunting between Llanfair Caereinion and Cyfronydd.

[3] In 2018, Dougal was shipped to Taiwan as part of a cooperation agreement between the Welshpool and Llanfair Light Railway and the Taiwan Sugar Corporation, which operates five short heritage railways at former mills.