<p>The Department published estimates of electricity network costs for the decade to 2020 as part of the Electricity Market Reform Delivery Plan Update Impact Assessment (published in July 2013)<Sup>1</Sup>. We estimate that £50 billion of investment inelectricity networks may be needed for the decade to 2020, of which£23 billion is transmission (onshore andoffshore).</p><p>(see para 123)</p><p>https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/225981/emr_delivery_plan_ia.pdf</p>