Type 4s

They Type 4 locomotives ran in the number serise between Class 40 and Class 53 plus the Class 57s, converted from Class 47s. They had horsepower between 2000hp and 2999hp and had numbers between D1 and D1999. The Class 43, Class 47, Class 50 and Class 57 see regular use on the mainline, the class 43s being used the most, being operated by GWR, Virgin Trains East Coast, Midland Trains, CrossCountry, Network Rail and Scot Rail. Class 40s and Class 52s can also be seen on railtours.