The company of Andrew Barclay Sons & Co. was known for manufacturing very robust small shunting and narrow-gauge tank locomotives. These engines mostly went to industrial plants, but also to some larger companies. An example of this was the “Alexandra” built in 1901 for the Alexandra (Newport and South Wales) Docks and Railway. It was a six-coupled, standard-gauge shunter and bore the works number 911 from Barclay. It was also described by the Locomotive Magazine as being extremely stable and had a copper firebox, the material of which being manufactured to the quality standards in the production of artillery shells.