© Crown copyright 2023 This publication is licensed under the terms of the Open Government Licence v3.0 except where otherwise stated. To view this licence, visit nationalarchives.gov.uk/doc/open-government-licence/version/3. Where we have identified any third party copyright information you will need to obtain permission from the copyright holders concerned. This publication is available at www.gov.uk/official-documents. ISBN 978-1-5286-4018-3 E02888043 03/23 Printed on paper containing 40% recycled fibre content minimum. Printed in the UK by HH Global on behalf of the Controller of His Majesty’s Stationery Office. Powering Up Britain – Energy Security Plan 1 Contents Introduction: A Plan for Britain’s Energy Security 2 1. Decisive Action for This Winter and Next 8 2. Enhancing Security of Gas Supply 14 3. Energy Efficiency and Clean Heat 21 4. A future of Cheap, Clean and British Energy 26 5. Markets and Affordability 60 6. Delivery Timelines 66 Powering Up Britain – Energy Security Plan 2 Introduction: A Plan for Britain’s Energy Security This Plan sets out the steps the Government is taking to ensure the UK is more energy independent, secure and resilient. Putin’s illegal invasion of Ukraine 12 months ago has put the need for energy security in stark perspective. Never again will we allow our energy security to be threatened. The Prime Minister has tasked the new Department for Energy Security and Net Zero with improving the UK’s energy security, creating greater energy independence consistent with net zero and reducing the risk of higher bills. Energy security necessarily entails the smooth transition to abundant, low-carbon energy. If we do not decarbonise, we will be less energy secure. We...