The Class 110 diesel multiple units were built by the Birmingham Railway Carriage and Wagon Company in conjunction with the Drewry Car Co. to operate services on the former Lancashire and Yorkshire main line.

They were an updated version of the Class 104, with more powerful engines, a revised cab design and raised bodyside window frames.

The TSLs were removed from most sets and scrapped in 1982 to reduce maintenance costs and to allow a higher performance for an accelerated timetable on the Calder Valley line.

The reduced capacity caused a problem with the upturn in traffic of the mid 1980s and some sets were supplemented in 1984–85 with centre cars from withdrawn Class 111 units.

Bradford Hammerton Street depot closed in 1984, and all remaining Class 110 units were transferred to Neville Hill in Leeds.