The locomotive was built by R. & W.Hawthorn, Leslie & Co.Ltd. for Blyth Harbour Commission. It was known as 'Blyth Docks No.2', it carried its number, B.H.C.No.2 on its saddle tank. In 1971 it was sold to the Yorkshire Dales Railway at Embasy for restoration, where it was named "PONY".
The locomotive made its way to the Great Eastern Railway at County School, Norfolk from the North Norfolk Railway (dates unknown), where it was rebuilt and awarded its 10 year boiler certificate in 1994. In 1996 the railway at County School closed, and the locomotive was purchased, along with another two locomotives, by a private individual.
In 1998 it was sold to the Chatham Historic Dockyard Trust and moved to Chatham, where in keeping with Admiralty tradition it was given a name associated with a Royal Navy Ship and named "ACHILLES". The loco ran at Chatham until its boiler certificate expired in 2004 and is currently out of service awaiting its 10 year boiler overhaul. The locomotive is named after "H.M.S. ACHILLES" a name carried by 4 Royal Navy Ships.