They were ssentially a continuation of Joseph Armstrong's 806 Class of 1873. They differed from the originals in having a cab and a domeless boiler from the start.
Use
The 2201s were widely distributed over the GWR system. Members of the class were in use on the Didcot, Newbury and Southampton Railway around 1910. They were all withdrawn by the end of 1921.
Allcock, N. J.; Davies, F. K.; le Fleming, H. M.; Maskelyne, J. N.; Reed, P. J. T.; Tabor, F. J. (1968) [1951]. White, D. E. (ed.). The Locomotives of the Great Western Railway, part one: Preliminary Survey. Kenilworth: RCTS.
Tabor, F.J. (February 1956). White, D.E. (ed.). The Locomotives of the Great Western Railway, part four: Six-wheeled Tender Engines. Kenilworth: RCTS.
MacDermot, E.T. (1982) [1964]. History of the Great Western Railway, volume 2, 1863-1921. Ian Allan. ISBN0-7110-0412-9.