ESOS is the UK’s response to Article 8 of the European Commission’s Energy Efficiency Directive. The new legislation’s aim is to cut carbon emissions by requiring large businesses to identify energy reduction measures and make energy savings. Thousands of UK organisations will be affected by the scheme.

What do I need to do?

Under ESOS, all large undertakings must perform an energy audit conducted or overseen by an approved ESOS Lead Assessor once every four years. Audits are to include an estimate of total energy consumption, covering buildings, transport and industrial processes, and identify energy saving opportunities. The audit must be signed off by a board-level director before being submitted to the Environment Agency. The first deadline will be 5 December 2015.

A large undertaking is:

Any UK company that either

a) employs 250 or more people

b) has an annual turnover in excess of 50 million euro (£38,937,777), and an annual balance sheet total in excess of 43 million euro (£33,486,489)

An overseas company with a UK registered establishment which has 250 or more UK employees (paying income tax in the UK)

You must take part in ESOS if your undertaking is part of a corporate group which includes another UK undertaking or UK establishment which meets these criteria.

If you do qualify you will need a Lead Assessor, of which we have one of the very best in John Carden. John is both a Chartered Energy Engineer and Chartered Energy Manager who has worked on energy projects for some of the worlds best known companies.

To receive further information or speak to our Lead Assessor, please email your contact details to and place the word ‘ESOS’ in the subject box.