SER also had some Cramptons built by Tulk and Ley. H. S. Wainwright (1899–1913) SECR B1 class 4-4-0 introduced 1900 rebuild of SER B Class SECR F1 class 4-4-0 introduced 1903 rebuild of SER F Class SECR O1 class 0-6-0 introduced 1903 rebuild of SER O Class SECR R1 class 0-6-0T introduced 1910 rebuild of SER R Class R. E. L. Maunsell (1913–1922) London, Brighton and South Coast Railway John Chester Craven (1847-1870) William Stroudley (1870–1889) Many of these engines were later renumbered, frequently into the "duplicate" series above 600. R. J. Billinton (1890–1904) D. Earle Marsh (1905–1911) LB&SCR B2X class 4-4-0 introduced 1907 rebuild of B2 LB&SCR C2X class 0-6-0 introduced 1908 rebuild of C2 LB&SCR E4X class 0-6-2T introduced 1909 rebuild of E4 LB&SCR A1X class 0-6-0T introduced 1911 rebuild of A1 LB&SCR E5X class 0-6-2T introduced 1911 rebuild of E5 LB&SCR E6X class 0-6-2T introduced 1911 rebuild of E6 L. B. Billinton (1911–1922) LB&SCR B4X class 4-4-0 introduced 1922 rebuild of B4 LB&SCR I1X class 4-4-2T introduced 1923 rebuild of I1 Following the grouping, LB&SCR locomotive numbers were prefixed with "B", but in 1931 the prefix was removed and 2000 added to the number. Minor companies Plymouth, Devonport and South Western Junction Railway Freshwater, Yarmouth and Newport Railway Isle of Wight Central Railway Isle of Wight Railway Diesel and electric locomotives Diesel shunters The Southern Railway built three diesel shunters in 1937, numbered 1–3. These became British Rail 15201–15203, and were later classified as British Rail Class D3/12. Twenty-six similar locomotives were built in 1949–1951 after nationalisation. They were numbered 15211–15236, and were later classified as British Rail Class 12. British Rail 11001, Southern Railway design, built 1949 at Ashford Works Mainline diesels The Southern designed a prototype class of mainline diesel-electric locomotive. Three were built, although none were finished before nationalisation. They were numbered 10201–10203, and later classified as British Rail Class D16/2. Electric shunters The Waterloo and City Railway (later acquired by the LSWR) had two electric shunting locomotives for its 500 V DC line. The first was of Bo wheel arrangement, built by Siemens Brothers & Co in 1893 later numbered 75S. The second was a Bo-Bo, built at Nine Elms Locomotive Works in 1899 and later numbered 74S. Mainline electric The Southern Railway also built two mainline electric locomotives numbered CC1 and CC2. They were renumbered 20001 and 20002 after nationalisation. A third