Zero Emission Bus Definition & Accreditation Process

Background and Challenge

Zemo Partnership is developing the definition of a Zero Emission Bus (ZEB) to support UK national funding schemes, such as the DfT’s Zero Emission Bus Regional Areas. This definition aims to ensure that zero emission bus funding achieves well-to-wheel greenhouse gas savings compared with Euro VI diesels, as well as zero emission at the tailpipe.


  • To use the ZEB definition in an accreditation and certification process, requiring OEMs to test vehicles over the UK Bus Cycle and demonstrate definition compliance.
  • To engage members by submitting views and discussing the evidence.

Actions and Outputs

  • A Zero Emission Bus definition.
  • The development of a robust test and accreditation process.
  • Support industry in the ZEB certification process.
  • Publication of approved certificates on Zemo Partnership website.
  • Optional: Webinar to inform industry of accreditation process and claiming incentives for ZEB.


April 2021– July 2021

Zemo Partnership Lead:
Dan Hayes

Project Manager, Bus Working Group

Join Us

If you want to get involved in the work of one or more of Zemo Partnership's Working Groups, why not join us, or contact the Secretariat for more information.