The British Rail Class 155 diesel multiple unit (DMU) was introduced in 1987–1988. Built by Leyland at Workington, 42 two-car units were produced using construction methods from the bus-building industry. Shortly after entering service, structural faults, including body cracks, led to the fleet being temporarily withdrawn. Rather than restoring them as two-car sets, British Rail split each unit into single vehicles, creating the Class 153 between 1991 and 1992. These single-car units were suited to rural and lightly used routes. Although short-lived in original form, the Class 155 remains an interesting part of British railway history.