Barry Railway Class B were 0-6-2T steam tank locomotives of the Barry Railway in South Wales. They were designed and built by Sharp Stewart and were virtually identical to the Class A that preceded it, with the addition of a trailing bogie. The first three, Nos. 6, 7 and 8 were introduced in December 1888 and the remainder of the batch (Nos. 9 to 20) were delivered between January and May of 1889. No. 7 was vacuum fitted and thus was able to haul passenger services as the relief engine for No. 5, a Class A.