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This page contains all of the latest information related to our preparation for Brexit and will be a central point for all our Brexit related information relevant for our customers. If you have any questions that aren't addressed here, please get in touch with us at

Current Assumptions

Summary of Key Changes

  • Day Ahead Implicit auction facilitated by EPEX will be replaced by Day Ahead Explicit auction facilitated by JAO on eCAT platform
    • Last Day Ahead Implicit auction to be on 30 December 2020 for delivery on 31 December 2020
    • First Day Ahead Explicit auction to be on 31 December 2020 for delivery on 01 January 2021
  • New Non-IEM Access Rules to apply from 01 January 2021
    • Introduction of full firmness to all auction products from final nomination gate closure
    • Requires signing a JAO Amendment for BritNed border for Long Term and Daily auction products. JAO will be facilitating this process.
  • All BritNed market Participants need to be registered with a European NRA for REMIT purposes - Link to ACM
    • ACER have published additional guidance on this topic - this document is available to download below.


The following diagram and table outline the timeline of activities related to Brexit. It is possible to download these as PDF documents below.

Brexit Timeline Diagram v5

Brexit Timeline Table v5

Please note that the Brexit Webinar slides contain the previous test dates for eCAT and RNP. The revised dates are 19 Nov - 04 Dec 2020.