Vale of Neath Railway 4-4-0ST locomotives

• 1 (1851 – 1872)
• 2 (1851 – 1872)
• 3 (1851 – 1872)
• 4 (1851 – 1872)
• 5 (1851 – 1872)
• 6 (1851 – 1872)

The only locomotives on the Vale of Neath Railway in 1851 were these six bogie tank locomotives. Built by Robert Stephenson and Company, they were smaller-wheeled versions of Daniel Gooch's South Devon Railway Comet class locomotives that were built at the same time by various companies. They were all withdrawn shortly after the Welsh gauge conversion in 1872.

• 7 (1854 – c.1858)
• 8 (1854 – c.1858)
• 9 (1854 – c.1858)

Three additional bogie tanks were added to the fleet in 1854. With smaller wheels and larger cylinders they were more powerful than the earlier locomotives, but in about 1858 they were converted to 0-6-0STs.

• Reed, P. J. T. (February 1953). White, D. E. (ed.). The Locomotives of the Great Western Railway, Part 2: Broad Gauge. Kenilworth: RCTS. pp. B31 – B32. ISBN 0-901115-32-0.
• Waters, Laurence (1999). The Great Western Broad Gauge. Hersham: Ian Allan Publishing. ISBN 0-7110-2634-3.