SEC Version 6.3 Designated

6 December 2018

SEC v6.3 came into effect on 5th December 2018. The Secretary of State has designated amendments to SEC Schedule 11 – TS Applicability Tables, incorporating the SMETS1 Prepayment Meter End date of the 15th March 2019.

You can find a copy of the SRO Letter here.

You can download a zip folder containing SEC v6.3 here, or download the individual sections of the SEC from the SEC and Guidance Documents page of our website. The redlined changes to these documents can be downloaded here.

If you have any questions or would like to discuss the changes to the SEC further, please contact the SEC Change Team on 020 7090 7755 or email