Successors to the nine steam engines owned by CSET (the Irish Sugar Co.) for shunting the company's sugar factory sidings at Carlow, Mallow and Thurles, a number of small diesels were used for similar duties.  This locomotive is one such. She was donated to the Society thanks to the efforts of Mrs Margaret Prendergast of Carlow, where this particular locomotive spent its working life.  Numbered No.1 the "Carlow diesel" is a useful member of the running fleet. There are tentative plans to fit this locomotive with electric lights and a vacuum exhauster to allow it to shunt the running set of Mk.2 carriages .