The London and North Western Railway (LNWR) Webb Coal Tank is a class of 0-6-2T steam locomotive. They were called 'Coal Tanks' because they were a side tank version of Webb's standard LNWR 17in Coal Engine, an 0-6-0 tender engine for slow freight trains.
The design was introduced in 1881 by F.W. Webb and had the same cheaply produced cast iron wheels and H-section spokes as the tender engines. A trailing radial axle supporting the bunker was added also with two similarly cast iron wheels. Three hundred were built between 1881 and 1897.