The London and North Western Railway (LNWR) 4ft Shunter was a class of 0-4-0ST steam locomotives.

Re-numbered as 3042, it worked on the Liverpool Docks railway system, with oil fuel apparatus and a warning bell for use on the roadway lines.

After the outbreak of World War I in 1914, it was loaned to the Kynoch shell factory at Witton, Birmingham and re-numbered 4.

In 1935, it was given a new boiler by W. G. Bagnall, a noted maker of small launch-type boilers, with an increased working pressure of 160 psi and the original Ramsbottom safety valve replaced by two Pop safety valves.

It became surplus in 1953, and was given to the BTC in 1954 for the beginnings of the National Railway Museum collection as the only surviving example of an original Ramsbottom locomotive (As Cornwall was one he rebuilt).