ESOS NEWSLETTER – MAY 2025 (ISSUE 36)
This issue of the ESOS Newsletter from the Environment Agency shares information on an initial Action plan's progress update that is to be completed by 5 December 2025.
Submission of Initial Progress Updates
Following submission of the action plan, which was required to have been provided by 5 March 2025, all ESOS participants, including those whose action plans proposed no energy saving measures, must submit an initial progress update (Progress Update 1). This must be done by 5 December 2025. The functionality to enable submission of the update will be made available in MESOS in mid-June, the Environment Agency will communicate via their newsletter when this goes live.
To support ESOS participants to prepare the information needed for the initial progress update, the Environment Agency has provided the following documents with this newsletter:
- an Initial Progress Update (PU1) template
- a Q&A containing regularly asked questions on Progress Updates
- detailed Progress Update guidance
The template, which may be shared with lead assessors and is optional to use, shows the questions that will appear in MESOS and enables collection of all the necessary data. Once the functionality to enable submission of the initial progress update is available in MESOS, the data must be transferred manually into MESOS as the template itself cannot be uploaded. Although lead assessors can assist with gathering information and completing the template for the initial progress update, only the responsible undertaking can enter and submit the data in MESOS.
Disaggregated undertakings, i.e. undertakings which have left their highest parent group / participant since it submitted an action plan, are required to submit an initial progress update on their own behalf if they have not agreed to do so with either their old group / participant or new group. This will require the creation of an account in MESOS, and the Q&A explains how to do this. The Q&A, guidance and template explain how to complete the information requirements.
Any late or non-submission of the initial progress update could be subject to enforcement action by the regulator.
Contact the Environment Agency
For any IT specific queries relating to the MESOS Reporting System, please contact the EA ESOS IT helpdesk.
If you have any queries relating to ESOS or if there is anything specific you would like to see in future ESOS newsletters, please consult the ESOS Guidance in the first instance or email the EA ESOS Technical Helpdesk.