Deutsche Bahn

Class 321 Alterations

Installation design and certification to make changes to the cab layout


Wabtec Rail Ltd. received an order from Eversholt Rail Group to modify seven ex-London Midland Class 321 units prior to them entering service with Abellio ScotRail. As part of this contract, there was a requirement to make the cabs operationally similar to that of the Class 320 vehicles operated by Abellio ScotRail. DB ESG was sub-contracted to undertake the installation design and certification required to make the necessary cab changes.



  • Vehicle survey at Wabtec Doncaster
  • Mechanical installation design drawings, including overall cab arrangements
  • Updated electrical schematics
  • Detailed modification, testing and commissioning procedures in Wabtec Rail Ltd. format.
  • Electrical risk assessment (FMECA)


  • Issue of Letter of Comfort in accordance with TN-029 (excluding WSP modification).
  • Issue of Design Conformance Certificate only for WSP Modification.


  • DB ESG provided technical support during the first-in-class installation.