Energy Savings Opportunity Scheme (ESOS) – 15th March 2024


Phase 3 Compliance Update

The Manage your Energy Savings Opportunity Scheme reporting system (MESOS) will go live on Tuesday 19th March 2024.

MESOS will be released in two stages, with the initial release allowing all participants to register their Phase 3 user and organisational accounts.

A further release allowing participants to start filling in their notifications of compliance planned for the second half of April 2024.

The Environment Agency (EA) will confirm the exact date of this second release by the end of March 2024 and will host a webinar to support this release in early April 2024.

Compliance Notification Enforcement Extension Position Statement

For organisations qualifying for Phase 3 of ESOS, the deadline for submitting a compliance notification is the 5th June 2024 and organisations should still look to meet this compliance notification deadline where possible. 

However, the Environment Agency and Regulators for the Devolved Administrations will not take enforcement action against you if you do not comply with this legal requirement provided that you meet both the following conditions:

  • Registration of your account in the new IT system has been completed by the 5th June 2024
  • You submit your notification of compliance by the 6th August 2024

This is in response to stakeholder representations made to UK Government and the Environment Agency on the implementation of ESOS Phase 3, including in relation to the Environment Agency’s ‘How to Comply’ guidance and delays in finalising the new ESOS IT system.

This regulatory enforcement extension period will cease after the 6th August 2024.

MESOS Supporting Guidance

The guidance aims to work alongside legislation and help participants in understanding the requirements. 

The guidance aims to balance comprehensiveness and brevity, with the use of worked examples to provide additional context. In response to feedback from user testing of the new digital system and from the recent webinar, the guidance will be updated. Updated guidance will be provided ahead of the compliance deadline, and participants will be informed when the updated guidance is available.

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