The ENA document EREC G99/1 governing the connection of embedded generators to the (other than domestic and similar projects <16A/phase) has been revised, with a new version coming into force at the beginning of September 2021.
The latest version can be freely downloaded from the Distribution Code website (or you can click here for a direct link to EREC G99/1-8)
The revision notes list this as a "minor technical modification". However, there are some noteworthy changes that affect the solar and energy storage projects we're involved in:
The previous EREC G99/1-7 was only published in August. It, too had some interesting changes, notably forewarning in the Foreword that energy storage units are likely to be required to export, or at least stop importing, during underfrequency events; a technical description of what this might look like (currently options) are included. The Foreword suggests that it'll be confirmed and become a mandatory requirement in 2022.