British Rail Class 321

The British Rail Class 321 alternating current (AC) electric multiple units (EMU) were built by British Rail Engineering Limited's York Works in three batches between 1988 and 1991. The design was successful and led to the development of the similar Class 320 and Class 322. Today the class is operated by Greater Anglia. Some have been converted to Class 320 and are operated by Abellio ScotRail.

British Rail Class 321

The British Rail Class 321 alternating current (AC) electric multiple units (EMU) were built by British Rail Engineering Limited's York Works in three batches between 1988 and 1991. The design was successful and led to the development of the similar Class 320 and Class 322. Today the class is operated by Greater Anglia. Some have been converted to Class 320 and are operated by Abellio ScotRail.