their position to enemy gunners.) They were returned to the Southern Railway in 1945. Following the formation of British Railways in 1948, twenty-six similar, but lighter locomotives were constructed to Bulleid's design. These later became British Rail Class 12. The three original locomotives continued their traditional work around London. Two of the locomotives were however loaned to the Western Region between 1951 and 1953 for use at the Acton marshalling yard. After replacement at Norwood by more modern locomotives they worked as shunters at Hither Green marshalling yard, at Eastleigh and Ashford works. One was also tried out at Lancing Carriage Works in 1961 as a replacement for the aged "Stroudley Terrier" but was found to be too slow. Although they were still in good operating condition, the locomotives were withdrawn in November and December 1964, as by then the Southern Region had many modern replacements. None have been preserved. Numbering The original intention was to number the locomotives 958 to 960, following on from the steam locomotives of the Z class, but as delivered they were numbered 1 to 3 in a separate list from the SR's steam locomotives. They were later renumbered by British Railways 15201–15203. See also List of British Rail classes Southern Railway diesels Footnotes References Ian Allan ABC of British Railways Locomotives, winter 1962/3 edition, page 229 Southern Railway (UK) locomotives D003.12 C locomotives Railway locomotives introduced in 1937 Scrapped locomotives Standard gauge locomotives of Great Britain Diesel-electric locomotives of Great Britain Shunting locomotives