British Rail Class 150 Sprinter

The BR Class 150 Sprinter was the first of the second-generation DMU family that transformed regional rail travel in Britain in the late 1980s and 1990s. Built at BREL York between 1984 and 1987, 137 sets were produced in two- and three-car configurations. The Sprinter concept arose from BR's recognition that the ageing first-generation DMU fleet — built in the 1950s and early 1960s — needed wholesale replacement, and that its replacement needed to be faster, more comfortable, and cheaper to maintain than what it succeeded.

Each power car in a Class 150 set was driven by a Cummins NT855R diesel engine producing 285 hp, giving the two-car formation a total of 570 hp and a maximum speed of 75 mph. The bogied underframe, replacing the four-wheel chassis of the Pacer family, gave a smooth ride by comparison, and the interior — while plainly functional rather than luxurious — offered a genuine improvement over both the Pacers and many first-generation DMUs in terms of seating comfort and internal space. The sets were designed from the outset for multiple-unit operation, allowing formations to be lengthened at busy periods.

The Class 150 entered service in 1984 with prototype sets (150001 and 150002) and the production fleet from 1986. They rapidly displaced locomotive-hauled coaching stock and first-generation DMUs from regional services across the Midlands, Wales, and the North. Under privatisation the class was distributed among Northern Rail, Wales & Borders/Arriva Trains Wales, First Great Western, and London Midland. As of 2026 a significant proportion of the fleet remains in service, though some sets have been displaced by newer Class 170 and Class 195 trains and cascaded or withdrawn.