
TheGWR0-4-0STsteam locomotives were acquired by theGreat Western Railway at the 1923grouping. They came from small railways (mostly inSouth Wales) and from contractors. Some of them survived intoBritish Railways ownership in 1948 and a few are preserved.
| Railway | Name/Number | Builder | Works no. | Build date | GWR no. | BR no. | Withdrawal date | Notes | image |
|---|---|---|---|---|---|---|---|---|---|
| Ystalyfera Tin Works | Hercules | Peckett | 810 | 1900 | — | 1 | Taken into stock in 1948 | ||
| Swansea Harbour Trust | 3 | Hudswell Clarke | 725 | 1905 | 150 | — | 1929 | ||
| 5 | Andrew Barclay | 1045 | 1905 | 701 | 1140 | 1958[1] | |||
| 7 | Peckett | 739 | 1899 | 886 | — | 1928 | |||
| 8 | 761 | 1899 | 926 | — | 1929 | ||||
| 9 | 908 | 1902 | 930 | — | 1927 | ||||
| 10 | 974 | 1904 | 933 | — | Sold to National Coal Board in 1928 | ||||
| 11 | 1053 | 1906 | 929 | 1141 | 1952 | ||||
| 12 | 1105 | 1908 | 968 | 1143 | 1960[2] | ||||
| 13 | Hawthorn Leslie | 2781 | 1909 | 974 | 1144 | 1960[3] | |||
| 14 | Hudswell Clarke | 939 | 1911 | 943 | 1142 | 1959[4] | |||
| 15 | Peckett | 1282 | 1912 | 1085 | 1146 | 1951[5] | |||
| 16 | 1302 | 1913 | 1086 | 1147 | 1951[6] | ||||
| 18 | 1522 | 1918 | 1098 | 1145 | 1959[7] | ||||
| Powlesland and Mason | 3 | Peckett | 1328 | 1913 | 696 | 1150 | 1952[8] | ||
| 4 | Peckett | 1449 | 1916 | 779 | 1151 | Sold 1964 | |||
| 5 | Brush Electrical | 301 | 1903 | 795 | — | 1929[9] | Rebuilt with pannier tanks in 1926 | ||
| 6 | 314 | 1906 | 921 | — | 1928[9] | Sold toBerry Wiggins & Co. Ltd. in 1928. On display at theSnibston Discovery Museum until March 2016. Now atMountsorrel Railway.[10] | |||
| 7 | Avonside | 1053 | 1874 | 925 | — | Ex GWR 1330; formerlySouth Devon RailwayRook. Purchased in 1906 | |||
| 11 | Peckett | 1054 | 1907 | 927 | — | 1928 | |||
| 12 | 1179 | 1912 | 935 | 1152 | 1961[11] | Used as static boiler at Didcot Steam shed in early 1960s | |||
| 14 | Andrew Barclay | 1273 | 1912 | 928 | 1927 | ||||
| Dorothy | Hawthorn Leslie | 2558 | 1903 | 942 | 1153 | 1955[12] | |||
| Cardiff Railway | 5 | Kitson & Co. | 3799 | 1898 | 1338 | 1338 | Preserved atDidcot | ||
| 6 | ? | 1339 | 1339 | 1934 | |||||
| Alexandra Docks | Trojan | Avonside | 1386 | 1897 | 1340 | — | Preserved at Didcot | ||
| Alexandra | 1387 | 1898 | 1341 | — | 1946 | ||||
| Taff Vale Railway | 267 | Hudswell Clarke | 166 | 1876 | 1342 | — | 1926 | ||
| 266 | Hudswell Clarke | 159 | 1876 | 1343 | — | 1925 | |||
| West Cornwall Railway | Fox | Avonside | 913 | 1872 | 1385 | — | Sold 1912 |