Energy consumption across our global occupied estate decreased by 1.7%. Electricity consumption, our primary energy source (89% of reported MWh), decreased across Asia and the US with reductions of 3.5% and 4.4% respectively. Across our UK / EU / Africa estate there was an increase of 4%. We continue to apply energy reduction programmes across our estate, including installing energy-efficient equipment such as LED lighting, improved efficiencies with Variable Speed Drives and air handling units. During 2018 energy audits of six of our largest sites (based on energy intensity / cost) in the Asia region were conducted, total savings of 1.6MWhs from improvement opportunities have been identified. A further six audits are scheduled during 2019.
Energy consumption from the investment portfolio, managed by M & G Real Estate, increased 5%. This is driven by a mix of portfolio changes (acquisition and divestment), changes to operational control of the assets and the impact of our energy efficiency investments. Self- generation continues to be reported for our solar photovoltaic installations at The Galleries Shopping Centre, UK and 66 & 72 Queen Square, an office in Bristol, UK.