Ad-hoc SEC Release – MP123 implemented

29 May 2020

An updated version of the SEC came into effect on 29 May 2020 to implement MP123 ‘IVP realignment of SMETS2 v2.0 and v3.1’.


What parts of the SEC were affected?

The following part of the SEC was affected:

  • Schedule 11 ‘TS Applicability Tables’


Where can I access the redlining?

The redlined changes to Schedule 11 can be found here.

Our Document Log lists the versions of each SEC document now in effect following this release.

You can download the individual SEC documents from the SEC and Supporting Documents section of our website or via CodeWorks.


Where can I find further information?

Further information can be found on the MP123 page of our website. If you have any questions, you can call us at 020 7090 7755 or email