The Class 175 Coradia is a type of diesel multiple unit passenger train used in the United Kingdom. The fleet of 27 sets were built from 1999 to 2001 by Alstom at Washwood Heath in Birmingham. They are part of the Coradia family of trains along with the Class 180. They are the basis of Arriva Trains Wales's express fleet, but cannot operate on all lines (including those fitted with ETCS).The entire fleet is owned by the rolling stock operating company Angel Trains.