0-4-0 locomotives were built as tank locomotives as well as tender locomotives. This small locomotive, painted in British Railways black livery, is representative of the kind you might have found shunting around dockyards or hauling mixed traffic on a light railway or branch line in the countryside. The earliest 0-4-0 locomotives were tender engines and appeared as early as c. 1802. The 0-4-0 tank engines were introduced in the early 1850s. The type was found to be so useful in many locations that they continued to be built for more than a century and existed until the end of the steam era.