Birmingham and Derby Junction Railway Locomotives comprised twelve passenger locomotives (ordered 1838) and two goods locomotives (ordered 1841). When the Birmingham and Derby Junction Railway (B&DJR) amalgamated with the Midland Counties Railway and the North Midland Railway to form the Midland Railway (MR) in May 1844, the former B&DJR locomotives were given MR numbers; previously, they had been named, but not numbered. Most were renumbered in February 1847.
Wheel arrangement was 2-2-2. All had 12 inch by 18 inch cylinders and 5 foot 6 inch driving wheels. First to be delivered in 1839 were those from Mather Dixon, with 'Tamworth' being used for the inaugural run.
Wheel arrangement was 0-4-2. These had 5 foot driving wheels.