We recently asked Transport for Wales about progress on ‘ Persons with Reduced Mobility’ upgrading of Sprinter Classes 150 and 153. They have now replied.
In summary, 150s were complete in 2019 and also part of the fleet of (26) 153s. Of the remaining 13 153 units that are not compliant, 9 will be converted in 2021 and 4 retired.
TfW confirm that these non compliant units are never operated singly and are always coupled to a fully PRM-compliant class 150 or 153.
These units have now been renumbered into the 1539xx number series to ensure they are readily identifiable
153306 153309 153310 153313 153314 153318 153321 153322 153326 153335 153368 153372 153382 (complete)
Still to work on : 153906 153909 153910 153913 153914 153918 153921 153922 153926 153935 153968 153972 153982
You can read the foi response here . Note that there is a typo in date of the data in the TfW response.