|Number built:||228 (114 2-car sets)|
|Engine:||Cummins NT855R5 diesel per car|
|Power:||520 hp (426 kW)|
|Formation:||Driving Motor Standard Lavatory (DMSL)+Driving Motor Standard (DMS)|
They are currently operated by East Midlands Trains, ScotRail, Greater Anglia and Northern. They have also been operated by a number of earlier companies including Central Trains and originally British Rail of course. They are among the most reliable trains in service today.
British Rail considered converting some Class 156s to single-car DMUs as the Class 152 for branch lines but in the end Class 155s were converted instead to form the Class 153.
|EMT 156 404 at Leicester|
|Northern 156 426 at Liverpool Lime Street|
|EMT 156 408 at Ambergate|
|Northern 156 455 (and 142 021) at Liverpool Lime Street|
|EMT 156 410 at Whatstandwell|
|EMT 156 470 at Derby|
 Brian Haresnape, Diesel Multiple Units: The Second Generation & DEMUs (Ian Allan, 1986) p. 79