Energy management

See a full summary of our energy consumption data (PDF) .

In typical operating conditions, energy consumption is our second largest source of greenhouse gas emissions (approximately 8.5% in FY24). We use a multi-faceted strategy to minimise energy consumed by our UK sites and related emissions. These measures comprise:

Technologies we employ to minimise energy consumption in our buildings include:

  • Building Energy Management Systems to optimise efficiency and provide virtual metering.
  • Thermostatic office temperature controls.
  • Upgraded chillers for comms rooms and set point controls.
  • LED lighting installations, digital lighting controls and zonal passive infrared (PIR) sensors.
  • Upgrades to fan coil unit (FCU) and air handling unit (AHU) systems.
  • Replacement boiler plant and water heaters.
  • Energy efficient IT monitors with stand-by mode.
  • Lift destination control software.
  • Print devices, vending machines and other equipment utilising sleep mode during low demand periods.

Our Technical Services team closely monitors energy consumption and conducts energy audits across our UK estate to identify opportunities for savings. When our offices undergo refurbishment or relocation, our technical standards and specifications dictate all building services and systems must align with current energy efficiency best practice. 

Performance against our FY24 targets

Target #1: Reduce total energy (kWh) consumed by 15% per m2 (compared to FY19)

 

FY24 energy efficiency (kWh per m2) fell by 23% compared to FY19. Energy efficiency initiatives implemented during previous years within the largest EY UK office (located in London Bridge) continued to deliver significant savings, despite increased occupancy levels throughout the reporting period. The London Bridge site contributed 83% of total energy saved across the UK estate, with a further 16% coming from its second largest office at Canary Wharf.

 

Although the scope to introduce further measures to the London locations is limited, we remain focused on operating the heating, ventilation, and air conditioning (HVAC) systems at optimum efficiency. To support this, we have engaged a building management system specialist to optimise system setpoints, time schedules and deadband controls without compromising staff comfort. These actions were identified as part of our Energy Savings Opportunity Scheme (ESOS) Phase 3 submission, with plans for implementation during FY25.

 

Across the wider UK estate, we continue to monitor consumption in UK regional offices and where the remaining lease and business case permits, we actively pursue energy saving initiatives to contribute to our net zero targets. For example, we are looking to extend the lease term at our Luton office, then upgrade all existing fluorescent lighting with like-for-like LED fittings. In July 2024, we relocated our Cambridge site to state-of-the-art premises, and in August 2024 we will move our Leeds office to a low-energy office complex with specific energy targets determined and monitored via the landlord, both of which will deliver further energy savings in FY25.

 

Target #2: Continue to ensure 100% of EY UK’s energy consumption (electricity and gas) is backed by renewable certification

 

In FY24, 100% of EY UK’s energy consumption was backed by renewables certification. This was achieved through a combination of Renewable Energy Guarantees of Origin (REGO) certificates received via our UK Virtual Power Purchase Agreement (PPA), renewable energy supplied by our landlords and our continued purchase of renewable biogas.

 

Our PPA is also helping to decarbonise the UK energy sector, by adding more renewable electricity into the national grid than we consume.

 

*FY19 is the base year as this was the last reporting period of pre-pandemic (i.e. typical) operating conditions.

 

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