The second prototype was engine number 98. Built with a half-cone boiler as standard, the difference between the earlier locomotive was in the valve gear layout and cylinder design, and in addition, the valve diameter had grown from 6½ inches (165 mm) to 10 inches (254 mm).
The third and last prototype was number 171 and although built in 4-6-0 configuration, it was quickly converted to 4-4-2 so that a direct comparison with the De Glehn locomotives was established. The third prototype's main contrast with previous prototype engines was a working pressure of . While the trials between the two locomotives were taking place, a further nineteen locomotives were ordered similar to the design of 171 except that thirteen were built as 4-4-2s while the remaining six were built as 4-6-0s, until a decision was made on the best wheel arrangement for the Great Western's lines.
| Year | Lot No. | Works No. | Quantity | GWR Numbers | Notes |
|---|---|---|---|---|---|
| 1902 | | | | 100 | Renumbered 2900 |
| 1903 | | | | 98 | Renumbered 2998 |
| 1903 | | | | 171 | Ran as 4–4–2 from 1904/10 to 1907/07. Renumbered 2971 |
| 1905 | | | | 172 | Built as 4-4-2. Rebuilt as 4-6-0. Renumbered 2972 |
| 1905 | | 2107–2122 | | 173–178 | Renumbered 2973–2978 |
| 1905 | | 2113–2114 | | 179–180 | Rebuilt as 4-6-0. Renumbered 2979–2980 |
| 1905 | | 2128–2137 | | 181–190 | Rebuilt as 4-6-0. Renumbered 2981–2990 |
| 1906 | | 2199–2208 | | 2901–2910 | |
| 1907 | | 2259–2278 | | 2911–2930 | |
| 1911 | | 2426–2435 | | 2931–2940 | |
| 1912 | | 2476–2485 | | 2941–2950 | |
| 1913 | | 2506–2510 | | 2951–2955 |
| No. | Name | Built | Withdrawn | Notes |
|---|---|---|---|---|
| 2900 | William Dean | Originally un-named. Carried name Dean from June to November 1902 | ||
| 2901 | Lady Superior | Named October 1906 | ||
| 2902 | Lady of the Lake | Named April 1907 | ||
| 2903 | Lady of Lyons | Named April 1907 | ||
| 2904 | Lady Godiva | Named April 1907 | ||
| 2905 | Lady Macbeth | Named April 1907 | ||
| 2906 | Lady of Lynn | Named May 1907 | ||
| 2907 | Lady Disdain | Named April 1907 | ||
| 2908 | Lady of Quality | Named May 1907 | ||
| 2909 | Lady of Provence | Named May 1907 | ||
| 2910 | Lady of Shalott | Named May 1907 | ||
| 2911 | Saint Agatha | |||
| 2912 | Saint Ambrose | |||
| 2913 | Saint Andrew | |||
| 2914 | Saint Augustine | |||
| 2915 | Saint Bartholomew | |||
| 2916 | Saint Benedict | |||
| 2917 | Saint Bernard | |||
| 2918 | Saint Catherine | |||
| 2919 | Saint Cuthbert | Originally named Saint Cecelia; renamed October 1907 | ||
| 2920 | Saint David | |||
| 2921 | Saint Dunstan | |||
| 2922 | Saint Gabriel | |||
| 2923 | Saint George | |||
| 2924 | Saint Helena | |||
| 2925 | Saint Martin | Rebuilt to prototype Hall class | ||
| 2926 | Saint Nicholas | |||
| 2927 | Saint Patrick | |||
| 2928 | Saint Sebastian | |||
| 2929 | Saint Stephen | |||
| 2930 | Saint Vincent | |||
| 2931 | Arlington Court | |||
| 2932 | Ashton Court | |||
| 2933 | Bibury Court | |||
| 2934 | Butleigh Court | |||
| 2935 | Caynham Court | |||
| 2936 | Cefntilla Court | |||
| 2937 | Clevedon Court | |||
| 2938 | Corsham Court | |||
| 2939 | Croome Court | |||
| 2940 | Dorney Court | |||
| 2941 | Easton Court | |||
| 2942 | Fawley Court | |||
| 2943 | Hampton Court | |||
| 2944 | Highnam Court | |||
| 2945 | Hillingdon Court | |||
| 2946 | Langford Court | |||
| 2947 | Madresfield Court | |||
| 2948 | Stackpole Court | |||
| 2949 | Stanford Court | |||
| 2950 | Taplow Court | |||
| 2951 | Tawstock Court | |||
| 2952 | Twineham Court | |||
| 2953 | Titley Court | |||
| 2954 | Tockenham Court | |||
| 2955 | Tortworth Court | |||
| 2971 | Albion | Built as No. 171. Named Albion February 1904. Rebuilt to 4-4-2, October 1904. Renamed The Pirate March 1907. Rebuilt back to 4-6-0, July 1907 and renamed Albion. Renumbered 2971, 1913. | ||
| 2972 | The Abbot | Built as 4-4-2 No. 172 Quicksilver. Renamed March 1907. Rebuilt as 4-6-0 April 1912. | ||
| 2973 | Robins Bolitho | Built as No. 173 | ||
| 2974 | Lord Barrymore | Built as No. 174 Barrymore. Renamed, May 1905 | ||
| 2975 | Lord Palmer | Built as unnamed No. 175. Named Viscount Churchill, 1907. Renamed Sir Ernest Palmer, February 1924. Renamed Lord Palmer, in October 1933. | ||
| 2976 | Winterstoke | Built as unnamed No. 176. Named, April 1907. | ||
| 2977 | Robertson | Built as unnamed No. 177. Named, April 1907. | ||
| 2978 | Charles J. Hambro | Built as No. 178 Kirkland. Renamed, May 1935. | ||
| 2979 | Quentin Durward | Built as 4-4-2 No. 179 Magnet. Renamed, March 1907. Rebuilt as 4-6-0, August 1912. | ||
| 2980 | Coeur de Lion | Built as unnamed 4-4-2 No. 180. Named in March 1907. Rebuilt as 4-6-0, January 1913. | ||
| 2981 | Ivanhoe | Built as unnamed 4-4-2 No. 181. Named in 1907. Rebuilt as 4-6-0, July 1912. | ||
| 2982 | Lalla Rookh | Built as unnamed 4-4-2 No. 182. Named in 1906. Rebuilt as 4-6-0, November 1912. | ||
| 2983 | Redgauntlet | Built as 4-4-2 No. 183 Red Gauntlet. Rebuilt as 4-6-0, April 1912. Renamed Redgauntlet, June 1915. | ||
| 2984 | Guy Mannering | Built as 4-4-2 No. 184 Churchill. Renamed Viscount Churchill in 1906. Renamed Guy Mannering, 1907. Rebuilt as 4-6-0, August 1912. | ||
| 2985 | Peveril of the Peak | Built as unnamed 4-4-2 No. 185. Named Winterstoke, February 1906. Renamed Peveril of the Peak, April 1907. Rebuilt as 4-6-0, May 1912. Withdrawn August 1931. | ||
| 2986 | Robin Hood | Built as unnamed 4-4-2 No. 186. Named in April 1906. Rebuilt as 4-6-0, May 1912. | ||
| 2987 | ''Bride of Lammermoor | Built as unnamed 4-4-2 No. 187. Named Robertson, November 1905. Renamed 'Bride of Lammermoor, April 1907. Rebuilt as 4-6-0, June 1912. | ||
| 2988 | Rob Roy | Built as unnamed 4-4-2 No. 188. Named, 1907. Rebuilt as 4-6-0, May 1912. | ||
| 2989 | Talisman | Built as unnamed 4-4-2 No. 189. Named, 1906. Rebuilt as 4-6-0, October 1912. | ||
| 2990 | Waverley | Built as unnamed 4-4-2 No. 190. Named, 1906. Rebuilt as 4-6-0, November 1912. | ||
| 2998 | Ernest Cunard | Built as unnamed No. 98. Named Persimmon, 1906. Renamed [Vanguard, March 1907. Renamed Ernest Cunard, December 1907. Renumbered 2998 in 1913. | ||
| 2999 | Lady of Legend | — | — | Modern conversion from previous 4900 class, 4242 Maindy Hall |