|Number built:||50 (25 2-car sets)|
|Builder:||Walter Alexander / Andrew Barclay|
|Engine:||Cummins LTA10-R diesel per car|
|Formation:||DMS (Driving Motor Standard)+DMSL (Driving Motor Standard Lavatory)|
Originally the 143s worked for British Rail's Provincial Sector and the Tyne & Wear PTE. In the privatised era they are operated by GWR and Arriva Trains Wales. Like the 142s their original transmission has been replaced with a Voith hydraulic one.
As with the other Pacer designs the 143s are (most probably) in their final years now with withdrawal planned for the end of the decade. Two trainsets have already been withdrawn due to fire damage.
|Arriva Trains Wales 143 606 at Cardiff Queen Street|
|ATW 143 609 at Cardiff Queen Street|
|ATW 143 614 (and a Class 142) at Cardiff Central|
|ATW 142 075 and 143 606 at Cardiff Queen Street|
 Colin J. Marsden, DMU and EMU Recognition Guide (Ian Allan, 2013) p. 125
 Brian Haresnape, Diesel Multiple Units: The Second Generation & DEMUs (Ian Allan, 1986) p. 70