The 8100 class of 2-6-2 tank engines consisted of only 10 engines. They were introduced in 1938 by Collett as a rebuild of Churchward locomotives of the 5100 class.
The locomotive in this photograph was originally built in 1905 as No.5124. It was rebuilt as No.8104 in 1938. The locomotive came to Worcester in September 1962 after many years at Neath in South Wales. No.8104 was withdrawn from service in December 1964 and was dumped behind the 'washout' shed when this photograph was taken.
A photograph of No.8104 in service can be found here.
Photograph taken by Andrew Smith.