Source Britain's Steam Railway Encyclopedia: BR Standard Class 9F
Source British Rail Class 03 (Wikipedia)
Source British Rail Class 120 (Wikipedia)
Source British Rail Class 123 (Wikipedia)
Source British Rail Class 124 (Wikipedia)
Source British Rail Class 126 (Wikipedia)
Source British Rail Class 14 (Wikipedia)
Source British Rail Class 42 (Wikipedia)
Source British Rail Class 52 (Wikipedia)
Source Britain's Steam Railway Encyclopedia: BR Standard Class 9F
Source Britain's Steam Railway Encyclopedia: GWR 1000 Class
Source GWR 1361 Class (Wikipedia)
Source Britain's Steam Railway Encyclopedia: GWR 1366 Class
Source Britain's Steam Railway Encyclopedia: GWR 1400 Class
Source Britain's Steam Railway Encyclopedia: GWR 1500 Class
Source GWR 2251 Class (Wikipedia)
Source GWR 2301 Class (Wikipedia)
Source Britain's Steam Railway Encyclopedia: GWR 2800 Class
Source Britain's Steam Railway Encyclopedia: GWR 2900 Class
Source GWR 3800 Class (Wikipedia)
Source GWR 4200 Class (Wikipedia)
Source Britain's Steam Railway Encyclopedia: GWR 4300 Class
Source Britain's Steam Railway Encyclopedia: GWR 4575 Class
Source Britain's Steam Railway Encyclopedia: GWR 4700 Class
Source Britain's Steam Railway Encyclopedia: GWR 4900 Class
Source GWR 4900 Class 5972 Olton Hall (Wikipedia)
Source Britain's Steam Railway Encyclopedia: GWR 5205 Class
Source Britain's Steam Railway Encyclopedia: GWR 5400 Class
Source GWR 5600 Class (Wikipedia)
Source GWR 5700 Class (Wikipedia)
Source Britain's Steam Railway Encyclopedia: GWR 6100 Class
Source Britain's Steam Railway Encyclopedia: GWR 6800 Class
Source Britain's Steam Railway Encyclopedia: GWR 6959 Class
Source GWR 7200 Class (Wikipedia)
Source Britain's Steam Railway Encyclopedia: GWR 7800 Class
Source Britain's Steam Railway Encyclopedia: GWR Castle Class
Source Britain's Steam Railway Encyclopedia: GWR Iron Duke Class
Source Britain's Steam Railway Encyclopedia: GWR King Class
Source Britain's Steam Railway Encyclopedia: GWR Star Class